Connecting an fpv camera under Linux. Budget FPV copter system

FPV is quickly becoming one of the most popular and extraordinary sports around the world. FPV gives everyone the opportunity to fly like a bird. For me, these are the most surreal sensations and are quickly addictive.

In this article we will look at what FPV for multicopters is, how to assemble an FPV system from simple to complex, how to choose hardware, and at the end there will be useful tips.

What is FPV

FPV is an abbreviation for First Person View(first-person view). In the RC world, FPV basically means a way to control a drone using a video camera on board. Real-time video transmitted to the multicopter (drone) pilot allows you to control it out of sight.

Some FPV pilots compare it to playing computer games. This is true, the only difference is that you are flying a copter that costs about $300, which you spent several days putting together. The increased level of focus makes this hobby intense and exciting. Whether you're flying a mini racing quadcopter or a slow-moving aerial photography quadcopter, you won't be left indifferent.

Benefits of FPV

FPV flight is a more precise way to control your multicopter, especially if there are a lot of obstacles around that make it difficult to see the drone. In addition, the copter will be able to fly higher and much further than without FPV.

FPV also makes control more realistic for the operator and allows a better feel for the equipment. And in total:

  • More agile flying
  • Precise Control
  • Flying higher and further
  • More pleasure from flying

Cheap FPV Choice

I highly recommend building your own multicopter and FPV system, which is the purpose of this article. But if you have absolutely no experience in electronics or don’t have the time, ready-to-fly quadcopters are available. One of the most famous examples is the Hubsan H107D FPV Mini Quadcopter.

This is a complete FPV system, LCD screen and video receiver are built into the radio transmitter. It's a relatively cheap way to get started in FPV flying and a good training platform.

How it works.

Unmanned aerial vehicle technologies continue to develop, all drone indicators are rapidly improving and growing: reliability, safety, controllability, etc. Features such as “return to home”, “FPV systems with head tracking”, “3D FPV glasses”, “obstacle avoidance”, “follow me function” and others appear.

The most common FPV system consists of the following parts:

  • camera
  • video transmitter (VTX)
  • video receiver (VRX)
  • video display

The camera is installed in front of the multicopter, which gives the pilot the feeling of being inside the aircraft.

Live video is transmitted using a video transmitter over a radio channel, then received by a video receiver on the ground. After this, the video signal is displayed on the monitor or FPV goggles.

More complex systems may include GPS and various types of sensors to display various flight data on the screen using OSD modules.

FPV camera

FPV cameras are usually lightweight and small for easy placement on drones. As with other cameras, you should first look at the resolution. But there are other factors influencing the decision.

TVL - resolution

TVL is a measure of camera resolution.

600TVL is the standard resolution for an analog camera and is usually sufficient for most people and monitors. You can fly with a camera with a lower resolution, such as 380 TV lines, but the picture will not be as clear. There are also cameras with a resolution of 800TVL and 1200TVL, but if your transmitter operates in the PAL/NTSC standard, you will not see more than 700 TVL (standard limitations).

Matrix type – CCD or CMOS

CCD and CMOS are two types of sensors inside cameras. CCD matrices are more expensive than CMOS, but are better for the following reasons:

  • less "jelly"
  • greater light sensitivity.
  • wide dynamic range
  • less noise

GoPro, Mobius, Runcam HD are all CMOS cameras and are not ideal for FPV, although they do an excellent job of recording HD video. These cameras have an analog video output, but it has poor dynamic range and latency.

Video format – NTSC/PAL

In fact, it is not a problem whether the camera is PAL or NTSC, usually FPV equipment supports both.

The main difference is that PAL offers higher resolution while NTSC offers more frames per second. Thus, if you need a better picture, then your choice is PAL. If you need to shoot a fast-paced scene, NTSC will do the job better.

PAL: 720 x 576 @ 25fps
NTSC: 720 x 480 @ 30fps

Delay

Latency in the case of an FPV camera is important if you need to fly close to obstacles or in case of racing. The delay in the video camera increases the pilot's reaction time. Individual analog video cameras provide significantly lower latency compared to HD video cameras such as GoPro or Mobius.

Video receiver and transmitter.

Video signal transmission is the basis of an FPV system. It determines how reliable the connection will be and how far you can fly without losing the video signal.

FPV frequencies

Before purchasing this special equipment, you need to understand what frequencies the video transmitters and receivers operate on.

Most commonly used frequencies:

  • 900 MHz
  • 1.2 ghz
  • 1.3 ghz
  • 2.4 ghz
  • 5.8 ghz

The lower the frequency, the greater the penetrating power, but the larger the geometric dimensions of the antenna. Additionally, not all FPV frequencies can be used legally, depending on local regulations and laws.

At the moment, the most popular frequency is 5.8Ghz for the following reasons:

  • legal in most countries
  • small antenna
  • cheapness
  • widespread
  • does not affect or affects slightly the 2.4Ghz frequency

Each frequency has its own number of channels. For example, at a frequency of 5.8 Ghz there are 32 channels. This allows pilots to select different channels when flying together. This way they can not interfere with each other.

Not all video transmitters and receivers can work on all channels, depending on the specific brand. Make sure the video transmitter matches the receiver.

Video transmitter power.

You can see video transmitters with powers of 25mW, 200mW, 600mW and even 1000mW (1W). More power means more range. But don’t blindly purchase a transmitter with more power.

First, you must check whether the selected FPV frequency and power is legal in your country or region.

Second, increasing the range by increasing the transmitter power is not very effective. To double the range, the power must be quadrupled. Let's say, if with a 200mW transmitter you got a range of 1 km, then to achieve a range of 2 km. your transmitter should output 800mW power.

I believe that there is no need to chase ultra-high power. Many people install a 5.8 Ghz transmitter with a power of 250mW and control a mini-copter at a distance of up to 1 km (with good antennas). Most people don't need to fly any further. However, the 5.8 Ghz frequency is not very suitable if there are objects such as trees and buildings between the pilot and the multicopter.

Antenna for transmitter and receiver

When it comes to choosing an antenna, you need to decide on several basic parameters.

  • Antenna polarization: circular or linear
  • Antenna gain: directional or omnidirectional.

Typically, transmitters and receivers come with whip antennas, which have a short range and are easily susceptible to interference. These are linearly polarized antennas. It is recommended to use circularly polarized antennas to improve the performance of the FPV system.

Directional antennas have a longer range, but you need to keep the antenna pointed towards the copter at all times. Otherwise, the signal reception quality will deteriorate.

Antenna types

Exists big number antennas used in FPV. I will list the most popular and frequently used ones.

  • Omnidirectional antenna– This is a stock whip antenna that comes with the transmitter and receiver. They have the same reception range in any direction, and they are easy to make yourself.
  • Clover antennas- These are circularly polarized antennas, usually with low gain. The radiation pattern of these antennas is donut shaped. Less gain above and below the antenna, most of it in the horizontal direction.

  • Helical and patch antennas- These are directional antennas that have greater range and penetrating ability.


Antenna connector type - SMA and RP-SMA

When choosing antennas for the receiver and transmitter, make sure that the connectors on them are compatible.

FPV glasses and monitors

Many people find it difficult to choose glasses or a monitor. FPV goggles are more expensive compared to a monitor, so I took a cheap 7″ to start with LCD monitor. A year later I upgraded it to good FPV goggles.

I truly enjoyed flying with the monitor. I could easily move my gaze from the monitor to the quadcopter - this is especially useful when landing. But I liked flying with FPV goggles even more. I could see my surroundings more clearly and felt more in control. In addition, the glasses are easier to carry and they do not sag at all in the sun.

In addition to price, the choice is influenced by personal preferences. Some people enjoy the thrill of flying while wearing glasses, others may experience headaches or feel uncomfortable wearing them. Your level of vision may also affect your use of glasses.

If you're interested in glasses, it's best to try them out from friends before making a purchase.

If you decide to buy a monitor, pay attention to the following details:

  • Correct video input: Make sure your monitor has AV input.
  • Input voltage: Make sure the monitor can be powered by 2S or 3S battery.
  • Options: Some monitors come with built-in recorders and receivers - this is quite useful.
  • Size: I think 7″ is quite sufficient and comfortable.
  • Brightness and backlight: this is important if you plan to fly in the sun. Although you can use a privacy shutter, problems may still arise if the image is not bright enough.
  • Blue screen: When the video signal is lost, some monitors show a blue screen (or black). This is not suitable for FPV, you need a monitor that shows interference when the signal is lost. Because if the video signal is bad, you can still return the copter back.

OSD – displaying data on the screen

OSD is used to display information during flight in live FPV video. This is not a required option, but knowing information such as battery voltage, GPS coordinates, speed, altitude, etc. is very useful.


Input voltage and voltage regulators.

You must be sure that your FPV equipment is powered by required voltage. Most FPV equipment currently runs on 12V. If your quadcopter is powered by a 3S LiPo battery (11.1V), then you can power the FPV system directly from the battery.

However, if the main battery is 4S or larger, you can power your FPV equipment with a separate 3S lipo battery. Another option is to use a voltage regulator to reduce, for example, from 4S 16.4V to 12 V.

LC filter (power filter)

Motors generate a large amount of interference in the copter's power system. If the FPV system is powered by the main battery, interference may occur on the transmitter and camera, resulting in jumpy white stripes in the video. This is especially noticeable if you apply gas.


An LC filter (power filter) is used to reduce noise in the power supply. They are sold ready-made or you can assemble them yourself.

If you use multiple cameras on cameras on a copter. For example, FPV camera and GoPro, you can use the video switch to display cameras alternately on the monitor or FPV goggles using one of the channels on the radio transmitter.

This is especially useful for those who fly with an FPV camera, but also want to periodically check what the HD camera is capturing.

Video frequency conversion!

Some FPV goggles have a built-in receiver that only supports 5.8Ghz. If you need 1.3Ghz or 2.4Ghz frequencies, you can make or purchase a conversion module.

Can I use my iPad, smartphone or other handheld devices for FPV?

Sure you can! You can stream live video via wifi or use an analog to digital video converter to display the video on your mobile device.

Where should I place my FPV components on the copter?

Locate the transmitter antenna as far as possible from other antennas, such as the receiver antenna or GPS antenna.

What is this jelly that I keep hearing about?

Jelly is an effect that occurs when the camera is exposed to vibrations from motors, propellers, or simply a poorly tuned quadcopter.

You may not see the jelly when flying on an FPV camera, but look how much vibration there is in the HD camera footage. CMOS cameras are more susceptible to vibration than CCD cameras due to differences in shutter operation.

What to do with the audio output of an FPV camera?

If you don't use it, just ignore it or cut it off.

How to learn to fly FPV?

Some first masterfully learned to control the copter visually, and then began to fly FPV. I think these are completely different ways of managing.

Also, various simulators will help you quickly acquire basic control skills, reducing the cost of broken copter parts.

FPV equipment in Irkutsk can be purchased in our online store

Sooner or later, or better yet, install an FPV system right away. We do not consider ready-made solutions, because we are not looking for easy ways.

FPV system consists of:

  • Cameras
  • Receiver and transmitter
  • Monitor

Camera for FPV

The camera can be used with any miniature analogue or action cameras for GoPro or SJCAM type with AV output.

You can make these cables yourself, but it's better not to take risks.

You can also use miniature analog cameras with a 12-volt power supply. (3 wires - yellow, red and black). But these are the extreme measures I took.

Receiver and transmitter

By the way, the seller often has a promotion, when ordering over $100 he gives a $5 discount

System assembly

Connecting the receiver to the monitor is easy. And connecting the camera to the transmitter can cause confusion.

Connecting an analog camera to FPV

An analog camera has 3 wires (yellow, red and black).

Solder these wires to wires of the same color on the transmitter. White and green need to be isolated.

Connecting an action camera to FPV

Two cables are used:

  • White and green for SJCAM (white AV+, green AV-)
  • Yellow and black for GoPro (yellow AV+, black AV-)

Cables on the transmitter:

  • Yellow (AV+)
  • Black (AV-)

We isolate the rest.

We set channel 1 according to the diagram on the box on the transmitter and receiver.

We supply power to the entire system. We turn on the camera (AV output), monitor, switch the AV input and see the image.

Greetings, dear UAV lovers. A camera for a quadcopter is, if not mandatory, then an extremely desirable attribute. Most drones are capable of carrying it on board, and best models aircraft may well be used for professional aerial video recording. In addition to taking photos and videos, cameras are widely used for FPV control, helping to more accurately control the flight of the copter. The main nuances of choosing and using video equipment will be discussed in our article.

A drone camera can be used to solve many problems, which are divided into 2 global groups:

  • Photo and video shooting, as well as an overview of the area over which the drone flies
  • FPV control

Advanced aircraft models can use two cameras (or even more) simultaneously. One provides FPV control, while the second provides high-quality shooting. This division did not arise by chance. Action cameras, often mounted on drones, are mostly capable of only recording, but cannot transmit video signal to a monitor. Or they do it with some restrictions. The problem is solved by purchasing FPV equipment.

Manufacturers such as Walkera, DJI, Xiaomi and some others equip their quadcopters with universal equipment that can both shoot and transmit video signals. The disadvantage in this case is that the shooting is done in digital format, image compression algorithms are used, and only after processing by the processor the data is transmitted.

All this leads to delay. For leisurely outdoor flights, a second's delay is not critical. Such a video cannot be called real and, although the copter manufacturer promises FPV control, in reality the pilot does not receive the signal immediately.

Analog FPV kits for quadcopters operate with minimal latency. The video stream is not processed, but is immediately transmitted to control equipment. For racing drones, for flying in environments large quantity potential obstacles (for example, dense urban areas, forests), all this is of great importance for professional videography.

There is also quite a few important point. FPV equipment consumes little energy, weighs little and is different high degree reliability and a fairly affordable price.

So, the choice is determined by the tasks that will be solved. For high-quality shooting, a good action camera with a 3-axis gimbal must be included in the package, while for true first-person control, analogue FPV equipment is required.

For shooting video

Many pilots purchase or assemble UAVs themselves, and only then install action cameras on them. A little later we will talk about quadcopter models that are equipped with video cameras at the factory.


At one time, GoPro devices were created new market portable shockproof and waterproof video cameras. Now dozens of companies are present on it. We have selected several popular models, which are often used to shoot video.

Top action cameras for drones

Our small top action cameras include 3 devices that are relatively inexpensive and equipped with Wi-Fi modules. With their help, you can use budget quadcopters to shoot high-quality videos.


We are interested in:

  • Amkov amk5000
  • Xiaomi YI action 4K
  • Sjcam sj4000 wifi

Amkov amk5000

The Amkov amk5000 wi fi action camera is one of the cheapest devices. Its cost in Chinese online stores is about $90. The delivery set can be called exhaustive. In addition to a variety of adapters, latches and pads, the package includes a waterproof box. There is also a helmet mount, that is, the scope of application of the amk5000 is very extensive and is clearly not limited to flights alone.


As the name implies, the camera is equipped with a wi-fi module. The user can control the device using a smartphone. And although the communication range does not exceed 50 meters, this is enough to activate the camera only after takeoff or turn it off before landing.

Main characteristics:

  • Dimensions 65x73x139 mm
  • Weight 78 g
  • 14 MP CMOS image sensor
  • Viewing angle 170 degrees
  • Run time up to 90 minutes in 1080 30p mode with Wi-Fi
  • Timelapse function
  • Micro-HDMI and micro-USB 2.0 connectors
  • Slot for SD, SDHC cards

The shooting quality can be described as average. The lens clearly lacks aperture, which is especially noticeable in cloudy weather. On the other hand, for $100 it’s unlikely to find a better option, and even with such a rich set of equipment. From action cameras entry level Amkov amk5000 wi fi is one of the best. Wide viewing angles ensure you don't miss anything.

Note that according to appearance amk5000 copies Hero, which, however, is not surprising.

Xiaomi YI action 4K

The Xiaomi YI action 4K model is a further development of the YI line and is currently one of the most advanced action cameras from Chinese manufacturer electronics. Traditionally for Xiaomi, the scope of delivery is modest.


In addition to YI action 4K, it includes a selfie stick and a Bluetooth remote control. There are no mounts, underwater housing, or adapters. Of course, any adapters can be purchased separately, but compared to more affordable competitors, the package looks meager.

The device costs about $200, it is not the cheapest video camera, but it supports recording in 4K resolution and is known for fairly high picture quality.

Main characteristics:

  • Dimensions 65x42x21 mm
  • Weight 95 g
  • Viewing angle 155 degrees
  • Image sensor CMOS ½.3″ 12 MP (Sony IMX377)
  • Electronic stabilization
  • Processor Ambarella A9SE75
  • Aperture F2.8
  • Operating time up to 110 minutes in 3840×2160 30p mode
  • Timelapse function
  • Micro-USB connector
  • Broadcom BCM43340 dual-band Wi-Fi module
  • Slot for microSDHC/SDXC cards

Xiaomi YI action 4K can even be used for FPV control by selecting “Live video mode” in the application menu. True, the communication range does not exceed 50 meters, so you won’t be able to fly far.

Shooting video using Xiaomi YI is not difficult at all. Settings, including advanced ones, are available in the application menu, but you can also use high-quality touch screen the camera itself. All shooting modes work flawlessly. Electronic stabilization allows for smoother images, but results in smaller frame sizes.

Sjcam sj4000 wifi

The Sjcam sj4000 wifi action camera, recently released in the new revision 2.0, is distinguished by its low cost (about $80), rich equipment, and the presence of a 2-inch display. The kit includes several mounts, a waterproof case and even a 32 GB memory card.


Main characteristics:

  • Dimensions 60x41x30 mm
  • Weight 46 g
  • Viewing angle 170 degrees
  • Image sensor Aptina0330 CMOS 3 MP
  • Electronic stabilization
  • Run time up to 88 minutes in 1920×1080 30p mode
  • Timelapse function
  • Motion Detector
  • Micro-USB and Micro-HDMI connectors
  • Wi-Fi module
  • Slot for microSDHC cards

This is one of the lightest action cameras in the review, weighing only 46 grams including battery. The quality of the shooting can be assessed as average. In low light, the image appears dark (a common problem with small lenses). 30fps at 1920x1080 is the limit for the sj4000. In the settings you can change the viewing angle, but this only leads to a worse picture.

Overall, the sj4000 is pretty good for the money. It can be installed on budget quadcopters to film your own flights. Light weight reduces the drone's carrying capacity requirements.

For FPV


A complete FPV kit for a quadcopter consists of:

  • Transmitter
  • Receiver
  • Cameras with video output
  • Antenna
  • Monitor (helmet, glasses)
  • Batteries for receiver and monitor

All this equipment is located on the copter and on the control panel. Advanced models of quadcopters allow you to connect FPV equipment to your own power supply. This reduces the flight time, but you can do without a separate battery.

You can assemble an FPV kit yourself (and this will be discussed in our article), but novice pilots are better off choosing ready-made drones. Very inexpensive models are available for sale that will help you get an idea of ​​PDF control. By the way, it is not at all a fact that you will like controlling a drone in first person, so there is no point in immediately spending money on an expensive drone.

Ready-made inexpensive FPV drones

And it is able to satisfy the needs of even very demanding customers.



We recommend paying attention to:

  • Hubsan H107D FPV
  • WLtoys V686G
  • JJRC H9D

All three models are inexpensive and equipped with cameras and displays. Copters cannot boast of stabilizing gimbals.

Hubsan H107D FPV


We have already, so I will give only the main characteristics:

  • Dimensions 140x140x32 mm
  • Weight 365 g
  • Flight duration up to 7 minutes
  • Communication range 50-100 meters
  • Video communication range up to 100 meters
  • Built-in camera 0.3 MP, resolution 640 x 480
  • Display size 4.3 inches
  • Battery 380 mAh

WLtoys V686G


  • Dimensions 360x360x100 mm
  • Weight 860 g
  • Flight duration up to 10 minutes
  • Communication range up to 150 meters
  • Display size 4.3 inches
  • Frequency 2.4 GHz for control and 5.8 GHz for video
  • Battery 730 mAh

JJRC H9D


  • Dimensions 230x230x130 mm
  • Weight 450 g
  • Flight duration up to 8 minutes
  • Communication range up to 150 meters
  • Video communication range up to 150 meters
  • Video camera 2.0 MP, HD resolution
  • Display size 4.3 inches
  • Frequency 2.4 GHz for control and 5.8 GHz for video
  • Battery 650 mAh

How to choose an FPV and why it's not that easy

The choice of FPV for a quadcopter depends not only and not so much on the price, but on the characteristics and capabilities that the pilot ultimately wants to receive.


Each system component has its own parameters and its own requirements for compatible equipment. What matters is the type of matrix, resolution, frequency used, and transmitter power.

You need to imagine how the FPV system will be configured, how to organize its power supply from the battery, which monitor or helmet to choose. It's not always possible to find detailed review one or another element.

Sensor type and latency: CCD vs CMOS

We already briefly talked about the delay at the beginning of the article. Today, there are no affordable solutions that can be used to broadcast a signal from a digital HD camera to a remote control or smartphone with minimal delay. Lag is inevitable, and it can be quite significant - up to several seconds. Any action camera, even the most latest generation, for example, Hero 6, loses in this indicator to an inexpensive FPV camera. As we have already said, if first-person control is needed, you should only look at analog video modules.

Cameras can use one of two types of sensors - CMOS or CCD. For FPV equipment, CCD matrices are usually used due to the following factors:

  • Better Exposure Controls
  • The “jelly” effect is less pronounced
  • Less noise in low light conditions

In turn, CMOS (widely used in digital HD video cameras) differs:

  • Higher resolution
  • Better color rendition
  • More high frequency personnel
  • Less power consumption

For FPV flights, the benefits of CMOS (other than reduced power consumption) are not very important. That is why the ratings of the best video cameras for first-person control include solutions based on CCD matrices.

TVL resolution

In the era of digital video, we are accustomed to the fact that matrix resolution is expressed in terms of pixels (1980x1080 and so on). For analog devices, the TVL parameter is used, that is, the number of horizontal lines that fit in the frame (or the number of possible transitions between colors).


The higher the TVL value, the better image quality, however, in the case of first-person-video, there is no need to chase maximum indicators. The higher the resolution, the higher the price of the camera, and, more importantly, the higher the video signal delay. Limitations are also imposed by the analog 5.8 GHz transmitter, which is capable of transmitting a certain amount of data per unit of time. If the capabilities of the transmitter are limited, then it does not have of great importance, how high-quality video equipment is used.

Drone cameras usually have a resolution of 600TVL, 700TVL, 800TVL.

Standard PAL\NTSC

Modern equipment works great with both formats, so you don’t have to worry too much about the fact that an NTSC camera ( this standard used in the USA) will be incompatible with a European or Chinese transmitter.


However, there are differences between the standards, and they can be seen with the naked eye by watching the drone fly on a monitor.

PAL supports more a high resolution, compared to NTSC (720×576 versus 720×480), which has a positive effect on picture quality. But NTSC has a better frame rate (30 fps versus 25 fps), which makes the video smoother.

Top cameras for FPV

There are dozens, if not hundreds, of drone cameras to choose from. The most famous manufacturers include Runcam, Foxeer, Caddx, Aomway, Boscam. In addition to video equipment, they also produce other FPV equipment.


Our top includes the following devices:

  • Runcam Eagle 2 (Full, Micro)
  • Foxeer Predator (Mini, Micro)
  • Caddx SDR1 (Mini, Micro)
  • Runcam Swift 2 (Full, Mini, Micro)
  • Foxeer Predator Arrow V3 (Full, Mini, Micro)
  • Caddx S1 (Mini, Micro)

Frequencies

The transmitter, which transmits the signal, and the receiver, which receives this signal, operate at a certain frequency. There are several common frequencies used in aircraft modeling, but the frequency most often used for video is 5.8 GHz.

There are other frequencies - 900, 1200, 2400 GHz. At a frequency of 2.4 GHz, the quadcopter is usually controlled. The lower the frequency, the greater its penetrating ability and. But the larger the antenna size.

The choice of 5.8 GHz for video transmission is not accidental. This frequency is legal in many countries (the use of some frequencies may be prohibited by law). In addition, you can use a small antenna, which is important for amateur drones. Video broadcast on 5.8 GHz has little or no effect on the 2.4 GHz control frequency.

At 5.8 GHz, up to 32 channels are available. This is an important parameter when it comes to mass joint flights, for example, racing.

Transmitter and its power

The higher the transmitter power, the greater the video signal transmission range. There are models on sale for 25mW, 100mW, 200mW and so on.


The peculiarity is that to increase the range by 2 times, the power must increase by 4 times. Accordingly, if a 200mW transmitter is enough to broadcast video over a distance of 1 km, then to organize signal transmission over 2 km you will have to take an 800mW transmitter. This is not always necessary or justified, while the cost of equipment increases noticeably, as does energy consumption.

Video switch

The video switch will come in handy if the quadcopter model has 2 video cameras installed. For example, one may be heading, while the second may be looking back or down. By switching, you can display video on the monitor from different sources.

Receiver

With the receiver everything is somewhat simpler. It can be made in the form external device with an antenna and video output, or built into a monitor or control panel. The receiver must operate on the same frequency and channel as the transmitter (usually all 32 channels at 5.8 GHz are supported). You can connect a display, glasses or a helmet to the receiver.

Antennas


When purchasing the first inexpensive set, the pilot is often content with the antennas that come with the kit. In general, when it comes to short-distance flights, they do their job well. But if it is necessary to ensure a better communication range, the standard antennas are replaced with more expensive analogues.

Types

The simplest whip (omnidirectional) antennas are usually supplied with FPV equipment. There are also so-called clover antennas, characterized by low gain.

Patch antennas (helix antennas) have the greatest range. They are used in advanced control equipment.

Connectors

There are two connectors that connect the antennas to the transmitter and receiver. This can be either an SMA connector or an RP-SMA connector. Before purchasing, please ensure that the connectors on the antennas, transmitter and receiver are compatible.

Glasses and monitors


The more expensive the monitor or glasses, the higher quality the picture they provide. A simple FPV monitor with a small diagonal, glare, and hard-to-read text will be more likely to hinder than help in control. The same is true for cheap video glasses with low frequency and not the highest quality screens.
For starters, the most suitable simple model monitor, but if flying really interests you, we recommend looking towards equipment from Fatshark.

OSD

OSD is an extremely useful device, thanks to which you can receive technical information about the condition of the quadcopter. A small OSD board (on-screen-display) connects to sensors (speed, battery voltage, current consumption, GPS, etc.) located on the flight controller. It also connects to the transmitter.

The pilot receives OSD information directly on the monitor screen or glasses. He can add or remove individual indicators if he does not need them.

Advanced models of quadcopters can be equipped with their own OSD boards (or this functionality is implemented on the flight controller board).

About food

In order for FPV equipment to function, it must be connected to a power source. Modern kits require 12V voltage. Accordingly, if a 3S battery (11.1V) is installed on board the copter, then the video camera with the transmitter can also be powered from it.

Voltage regulators

In cases where the copter is equipped with a 4S (16.4V) or larger battery, you can use a voltage regulator. If there is no regulator, or you don’t want to connect to the drone’s battery, a separate 3S battery is installed.

Power filter

When connected to the aircraft's power system, the operation of the camera and transmitter may begin to be affected by interference from the motors. As a result, the image on the screen will be replete with white stripes. A power filter is used to combat interference.

FAQ


At the end of our review article on organizing FPV on quadcopters, we will answer several frequently asked questions.

Where is the best place to place the equipment?

If your quadcopter already has a video camera and you intend to use it to record flights, a small FPV camera can be attached directly to its body.

As for the transmitter antenna, it should be placed as far as possible from the copter antennas so that they do not create additional interference with each other.

What is "jelly"?

The jelly effect is caused by the vibration of the quadcopter body caused by the operation of the propellers and motors. The image seems to be shaking or floating a little. When broadcasting video from a camera, the effect may not be noticeable. But when watching a recorded video, it manifests itself in full (if there is no gyro-stabilized gimbal).

What to do with the audio output?

The audio output is usually not used, so you can safely forget about it.

Video frequency conversion

Frequency conversion may be necessary if the receiver built into glasses or a monitor can only operate at a frequency of 5.8 GHz, while you want to operate at a frequency of, for example, 1.2 GHz. In this case, a special conversion module will be useful.

Is it possible to display video on a smartphone?

Many action cameras equipped with a Wi-Fi module can broadcast video to a smartphone or tablet. The problem is that the communication range via a Wi-Fi connection is very limited and does not exceed 50-100 meters, depending on conditions.

You can solve the range problem using an analog-to-digital converter, but this does not make much sense, since a noticeable delay occurs. During the time that analog signal will be converted to digital, the copter will have time to end up in another place.

How to learn to fly?

First you need to master it, get used to the remote control, try different flight modes and different levels expenses. The first flights of the drone should be carried out at a short distance from the control panel, at low speed, in open areas without natural or artificial obstacles. Computer simulators can help you get used to the controls, although most pilots prefer real-life experience.

Conclusion

We tried to consider in detail the features of choosing FPV equipment, talked about the most important parameters and characteristics, and gave examples of ready-made models of FPV quadcopters.

Control using first-person video is significantly different from the control most pilots are accustomed to using only a remote control. It makes it possible to make long-distance flights without fear of crashing the copter on a sudden obstacle. When using high-quality components (primarily glasses and a camera), the pilot gets a completely different experience. In this augmented reality, he no longer just gives commands, but he himself seems to be present on board the aircraft.

This concludes the article about FPV on quadcopters. Subscribe to our new reviews, share useful materials on social networks, and see you again.

Before creating a new topic on the forum, carefully read the FAQ and use the search. If you have questions, try to ask them in a thread related to your question instead of creating a new one. If you are not sure where to ask a question, it is better to ask it. In this FAQ you will find many links to the most popular and discussed topics in the section.

FPV (First Person View) or video piloting or “camera flights” is a direction of radio modeling, focused on controlling a radio model remotely, with a “first-person view”, using a camera installed on the model. The camera transmits a video/audio signal from the model to the ground, the pilot sees the image in real time and carries out the flight. FPV allows you to control the model for kilometers, tens of kilometers of range, rise above the clouds, feel like a pilot of a real airplane, enjoy extreme flights and enjoy beautiful views from inaccessible heights.

Things a new FPV pilot should know:

Start simple. There are many different expensive components for FPV flights (video glasses, telemetry and autopilot systems, diversity, head trackers, antenna trackers, etc.) There is no need to try to buy EVERYTHING at once and to the maximum. In order to try “first-person flight”, it is enough to purchase a camera, a video transmitter/video receiver and output the image to any available portable device. You will always have time to buy the rest of the equipment if desired and as needed.
Follow safety precautions. Before turning on the video transmitter, make sure that other pilots are not using similar frequencies and your transmitter will not interfere with them. Without sufficient experience, do not fly near people, cars or other places where your model could cause harm if it fails. Do not fly near active runways or in areas of heavy air traffic.
Gain experience. In this hobby, there are no ready-made complex solutions that work out of the box. In order to implement your FPV project, you will have to at least learn how to hold a soldering iron in your hands, read manuals and obtain information. There are many experienced FPV pilots on the forum who are ready to help you master this hobby.

FPV Models

Q: What are the requirements for an FPV model?
A: In principle, any model capable of flying to one degree or another is suitable for FPV piloting, but it is desirable (but not necessary!) for it to have the following characteristics: survivability and maintainability (fpv models often crash for one reason or another), push screw (does not interfere with the camera), good load capacity and capacity (fpv models have to carry various electronic equipment). Of course, there are exceptions.

Q: Electric or internal combustion engine?
A: For a number of reasons, FPV modelers greatly prefer models with electric motors. They are lighter (safer for others, easier to repair, catch rising air currents better), prepare for launch faster, are less susceptible to vibrations, issues with model alignment are easier to resolve, cameras do not suffer from exhaust dirt, most telemetry systems are designed for electric models. However, this does not mean at all that FPVs do not fly on ICE models.

Q: Which model should I choose for FPV flights?
A: Although any model is suitable for flights with a camera, there are certain models that are designed for such flights from the start. Here are some of the most popular ones that can be purchased: Skywalker, Skyhunter, X8, X7, EPP-FPV 1.8M R/C Plane, X-UAV Talon, Bormatec MAJA, Bormatec VAMP, URSUS FPV, Zephyr ZII, FPVRaptor, Falcon, BD5, The following models were not positioned by the manufacturer for FPV, but are also successfully used by FPV pilots: , Multiplex EasyGlider. The choice of FPV models is not limited to this. We also have our own projects, they also fly seaplanes, replica impellers, internal combustion engine aircraft and much more. The choice of model depends on the flight style, planned range, desired flight time, etc. preferences. Particularly worth noting is the FPV model. This model is not without its drawbacks, but due to its “versatility”, it is one of the most popular and discussed today, so beginners should pay special attention to it.

Cameras

Q: What standard of camera do you need, PAL or NTSC?
A: Historically, PAL is most common in Europe and most FPV pilots in Russia also use PAL (576 lines, 25 fps). However, all video transmitters and receivers understand both formats, modern devices image output too, so you won’t have any difficulties with NTSC cameras (486 lines, 30 frames/sec).

Q: Which power supply should I choose for the camera, 5V or 12V?
A: This is a matter of personal preference and convenience. If your video transmitter operates on 12V, then it is more convenient to power the camera along with it from one Lipo 3S battery.

Q: Which lens is better for the camera, 4mm, 3.6mm or 2.8mm?
A: Choose the one with which you are most comfortable flying. The angle of view (FOV) depends on the choice of lens. The 4mm lens has a smaller angle of view, but the picture is a little closer and with less distortion at the edges, the 2.8mm lens has a larger angle of view, but the picture is a little further away and slightly rounded at the edges. Watch YouTube videos with different lenses. Here are examples of how the picture changes depending on the type of lens. Lenses are not expensive, you can buy several and change them on the camera at your discretion.

2.8mm lens = 130 degree field of view2.9mm lens = 127 degree field of view (corresponding to the human eye)3.6mm lens = 92 degree field of view4.0mm lens = 88 degree field of view

Q: Some models have two cameras, what is this for?
A: One camera is used as a “course camera”, from which a video signal is transmitted through a transmitter to the ground to the pilot. The second camera can be used to record images in high quality (HD) on board the model. Some cameras can simultaneously record on board and transmit images to the ground, such as the GoPro HD, popular among FPV pilots.

Q: What are headtrackers and what are they for?
A: A head tracker is a device that reads the position of the pilot's head to deflect the camera on the model. Here

How does he work.

Q: Still, which camera should I choose and how do they differ?
A: Cameras differ in sensitivity, resolution (number of lines - TVL), richness of settings, etc. parameters. Some transmit images well during the day, some are designed for night flights, some become blind in the sun, others do not (WDR technology), some have a detrimental effect on the video transmitter, others have no effect at all. This thread contains a lot useful information on different cameras, with video examples.

Video transmitter and receiver

Q: What frequency kit should I choose and how do they differ?
A: There is no clear answer to this question and the debate about “which is better” is still going on. Here is a small selection of material on this issue:
900Mhz is a range with good penetration through trees, however, a number of features of this range and the implementation of the equipment do not allow flying over very long distances. With good antennas you can achieve a range of about 5 km. Not a bad choice for “low and close” cross-country and medium-distance flights.
1.2/1.3 GHZ – good frequency with great potential for long distances (there are flights of 30 km or more). It is difficult to find a ready-made one for this frequency good antenna, but there are many drawings various types antennas that you can make yourself. Large selection of kits from different manufacturers By different prices and quality makes this frequency very popular among FPV pilots. There may be some negative impact on some 2.4 Ghz radio control kits (reduced range).
2.4 GHZ is a frequency with slightly less range potential and lower penetrating power, but it is capable of transmitting a video signal more High Quality. Another advantage is that a huge number of commercial antennas are available for this frequency. Minus - near cities this range is very busy (Wi-Fi, etc. devices). Under no circumstances should you buy such a kit if your model control equipment operates at a similar frequency (2.4 GHZ)
5.8 GHZ - the frequency does not shine with range and has the lowest penetrating power. Antennas can be found commercially, but are very difficult to manufacture. The advantage of this frequency is free, clean air, zero impact on control equipment and the ability to transmit the best quality picture! Another advantage is the smallest (compared to other bands) antenna size. Not a bad choice for flying “low and close” without obstacles with excellent picture quality.

Q: What power should I choose for a video transmitter?
A: Do not buy transmitters with the highest possible power unless you plan to set distance records. The power should be sufficient for the distance you expect to fly. Excessive transmitter power can negatively affect the radio control range and lead to unnecessary current consumption and heating. For example, for flights at 1-5 km (frequency 1.2/1.3 GHZ) a 400mW transmitter is sufficient, for flights at 10-20 km 800-1000mW (when using directional antennas).

Q: Which manufacturer’s kit should I choose?
A: There are expensive and high-quality lawmate kits and there are all the others. Of the “all others”, the popular kits are FOX, Bevrc, etc., but it depends on your luck. Very good selection and Receivers/Transmitter Review. The kits differ in the number of channels, price, quality, sensitivity, etc.

Q: Which transmitter channel should I choose for my flight?
A: You can choose any channel you like, but experienced pilots like to find the channel on which the transmitter works most effectively.

Q: Does the video transmitter affect other electronic devices on board the model?
A: Yes, a transmitter (especially a powerful one) can have a negative effect on some types of servos (causing them to twitch). Typically, digital servers are less susceptible to its negative effects. Here is a list of servos that you should avoid using, especially if they are located close to the transmitter: 9g in blue plastic (rctimer, hextronic, turnigy, towerpro), Hitec HS82MG (Metal Gear), TPro MG90s, MG16R.

Q: Where is the best place to place the video transmitter on the model?
A: It is advisable to place the video transmitter as far as possible from the RU receiver. The second important point is that the transmitter antenna should not be “shaded” by batteries and other electronics of the model in any position relative to the pilot (especially when flying long distances). The method of placing the transmitter on the wing of the model is quite popular, but there is no universal advice here, it all depends on the characteristics of your specific project.

Antennas

Q: What types of antennas are there for FPV and how do they differ?
A: Antennas come in omnidirectional and directional types. In layman's terms, omnidirectional antennas transmit and receive radio signals in all directions (circular radiation pattern). Directional antennas have a radiation pattern limited to a certain angle. It is not difficult to guess that the “coverage area” of omnidirectional antennas is larger, and the range (sensitivity) is less than that of directional antennas.

Q: What type of antennas and where are they installed?
A: In most cases, an omnidirectional antenna is installed on the model. Either an omnidirectional or directional antenna is installed on the ground, depending on the range and style of your flights.

Q: What types of omnidirectional antennas are there and how can they be made?
A: The antennas that come with the video receiver and transmitter are omnidirectional (a pin in a plastic casing). In most cases, their quality leaves much to be desired. Can be made (or bought) following types antennas for the frequency you need: , . Sets of 2 omnidirectional antennas (on the receiver and transmitter) are more often used when flying “low and close”.

Q: What types of directional antennas are there and how can they be made?
A: Here are some of the most used directional antennas: , Bi-Quad, Yagi (wave channel), Helical. Antennas differ in sensitivity, directional angle, and manufacturing complexity. Pilots achieve good range results using the Dipole and Vee dipole antennas (on the model) + Patch antenna and Yagi (on the ground), as well as CloverLeaf (on the model) + Helical (on the ground). It is worth noting that due to ease of manufacture, patch antennas are the most popular among FPV pilots.

Q: How can directional antennas be used and what is a tracker antenna?
A: Directional antennas can be used on the ground to both increase the range of video reception and to increase the range of control equipment. It is important to remember that the model must fall within the directional angle of your antenna (each antenna has its own), otherwise you may lose the signal. There are special antenna trackers that allow you to automatically aim the antenna(s) at the model. Antenna trackers are usually included in various telemetry kits.

Q: What is diversity and what is it used for in FPV?
A: This is a special device to which you can connect several video receivers with different antennas (for example, directional and omnidirectional). Using a certain algorithm, Diversity determines which video signal is better and outputs it. Diversity is included in some telemetry kits and is also sold separately. They differ in prices and algorithms for determining the “best” signal.

Telemetry and autopilot

Q: What is telemetry and why is it needed on an FPV model?
A: This is a set of technologies that allows remote measurements and collection of information to be provided to the pilot. In most cases, telemetry is implemented in the form of a picture that is superimposed on a video image, also called OSD (

). Depending on the sensors included in the telemetry kit, it can inform the pilot: battery voltage, energy consumption, propeller rotation speed, flight coordinates, speed, altitude, direction to the starting point, temperature, etc. options. Most of the flight data is provided by the presence of a GPS sensor.

Q: What is an autopilot and what is it for?
A: This is a device that guides the model along a certain trajectory independently, without the participation of the pilot. Autopilot may be included in some telemetry packages. The autopilot is mainly used for manual or automatic return of the model in case of loss of the control signal (RTH - Return To Home function), “flight by waypoints”, maintaining the flight direction (Fly By Wire). For correct and reliable operation of the autopilot, a model stabilization system is required.

Q: Do I need telemetry? What types of telemetry kits are there, how do they differ?
A: If you are going to seriously engage in FPV flights, then the presence of telemetry on the model is mandatory (although in the first flights over short distances you can do without it). There are a huge number of different telemetry kits. They differ in price, set of sensors and additional electronic devices, the presence of a ground station, settings, functionality, autopilots and other features. Here is a comparison table of some of the kits. This information may not be complete or accurate because telemetry is rapidly evolving and changing its functionality. Without delving into the weeds, I will list several popular kits and their advantages.

Cyclops Easy Osd(low price, shows most required parameters, no autopilot)
(reasonable price, a large number of sensors and devices that can be purchased separately, autopilot (RTH), voice warnings, good manufacturer support, stabilization, ground station with diversity, antenna tracker and video signal splitter, flight logger)
(reasonable price, perhaps the most beautiful OSD with a huge number of displayed flight parameters and graphics, autopilot (RTH and “flying to points”), support for I2C devices, stabilization)
(domestic development, good support in Russian and Russian-language interface, support for I2C devices, autopilot with advanced settings (RTH, “fly by wire”), stabilization, ground station with antenna tracker and video signal splitter. Developer’s website)
Ikarus Osd(built-in multi-camera switch, autopilot (RTH, “point-by-point flight”), ground station with display of flight parameters and video on a computer in one window)
(autopilot (RTH, “fly by wire”, point-by-point flight), good support, integrated stabilization)

This is far from full list both telemetry and their characteristics, each has interesting features that distinguish it from the rest

Q: What is a ground station and what is it for?
A: A ground FPV station as part of telemetry, this is a special electronic unit that can perform the following functions: receiving and decoding flight data from the model, processing it to control the antenna tracker, providing it to the pilot in “pure form” (for example on a computer), splitter video signal, diversity, etc. Also, a ground station means a set of devices connected on the ground to display images, additional flight data, placement and/or rotation of antenna(s), etc.

Control equipment

Q: Which of the existing “model” equipment on the market provides the maximum flight range?
A: It has been experimentally proven that the longest communication is provided by Futaba FASST equipment. Even despite the problematic and clogged 2.4Ghz range, with such equipment a flight range of 3-5 km was achieved without any modifications. A special advantage of Futaba is that the algorithms of this equipment make it possible to minimize the negative impact of the video transmitter on board the model on the flight range. It is worth noting that for different regions Futaba supplies equipment with different power outputs. It is believed that the maximum power is for equipment produced for the American market.

Q: How many control channels do you need to have on the equipment to control an FPV model?
A: To the control channels of this model we add: +1 channel if we want to rotate the heading camera (or +2 channels if we want to rotate and tilt, for example using a headtracker), +1(2) channels for controlling telemetry (if available), + 1 channel if there is external stabilization and we want to be able to turn it on and off in flight. Total: on average +1(3) channels. The maximum is limited only by your imagination.

Q: What other ways are there to increase flight range?
A: The use of boosters (radio signal amplifiers), the use of directional antennas and the use of special LRS (Long Range System) systems. All of these technologies, individually or together, provide a maximum flight range that far exceeds the capabilities of any “model” equipment.

Q: What is a booster and how can it be used?
A: A booster is an amplifier of the output signal of the equipment. If conventional equipment has an average power of 50-100mW, a booster allows you to increase its power tens of times.

Q: Directional antennas, what is the point of them?
A: Absolutely the same as in directional antennas for video reception, only in this case the antenna will not receive, but emit a radio signal. At the same time, the range increases significantly, but it is worth remembering that such an antenna has a certain operating angle characteristic of its type. It makes sense to use directional antennas together with boosters and antenna trackers. The range of booster-amplified and directional antenna equipment can reach 10-20 km.

Q: What is LRS and what types of LRS are there?
A: LRS - Long Range System. This is a system specially designed for FPV to control models at long and ultra-long distances. LRS systems consist of a special receiver, which is installed on the model, and a transmitter, which is connected to the equipment. Thanks to the use of longer-range frequencies, special algorithms and increased power, these systems are the most promising way to carry out long-distance FPV flights with a stable level of communication today. There are different LRS systems, they differ in prices, workmanship, richness of settings, power, operating algorithms, and the presence of special additional functions. Here are some of them: , LRS module Expert RC 433 MHz, LRS module Chainlink 433 MHz, Thomas Scherrer UHF RC system, DragonLink, EzUHF , LRS module 433 MHZ RD4047, OpenLRS.

Image output and recording devices on the ground

Q: What do FPV pilots use to obtain images on the ground?
A: For flight monitoring, special video glasses, portable TVs (car navigators, etc. devices with AV input) and laptops along with special video capture devices are usually used.

Q: What types of video glasses are there and how do they differ?
A: There are different glasses, they differ in price, resolution, matrix quality, viewing angle, method of connection to the receiver (cable or radio link), the presence of a built-in headtracker, etc. chips. The choice of glasses is a matter of personal preference.

Q: Video capture devices, what are their advantages and what are they?
A: Video capture devices connect to a laptop and allow you to display an image on its screen. Their advantages are low price (good for novice pilots), the ability to simultaneously view and record video images on a laptop, compatibility with some telemetry kits (for example Ikarus OSD), which allow you to see on one screen both the picture and telemetry data and the position of the aircraft on a Goggle-type map Map. One of the most common devices is EasyCap (EzCap).

Q: Is it possible to display an image on several devices at once?
A: Yes, of course, but you won’t be able to simply parallelize the video cable; for this you need to purchase a special video signal splitter, for example this one. Some telemetry equipment includes splitters in the ground station kit (for example, Eagle Tree OSD and Smalltim OSD).

Q: What else can you use to record images on the ground, besides video capture devices?
A: There are various portable recorders. They differ in price, recording quality and additional functions. The largest selection of such devices is collected in this topic.

Q: I plan to fly with a GoPro HD camera, recording in good quality will be conducted on board the model. Why else would I need to record video on the ground?
A: Ground recording is essential if you plan to fly long distances. In case of unforeseen situations, for example, a fall far from the starting point, the recording will help to find the missing model.

Missing model search devices

Q: I plan to use the most powerful video equipment, LRS systems and a cool autopilot, and fly in an area that I know like the back of my hand, why do I need such devices?
A: As experience shows, anything can happen in flight. A loose wiring harness, a jammed servo, or a simple glitch can cause you to lose control and crash the model when you don’t expect it at all. At the same time, even a familiar area where you walk every day looks COMPLETELY DIFFERENT from the air! There have been cases of irretrievable losses of models that fell just 500m from the starting point, simply because they could not be found and did not know exactly where to look. Considering that many FPV models cost $1000 or more, such devices are a necessity for many.

Q: What types of search devices are there and how do they differ?
A: In addition to equipment for recording flights on the ground (discussed above), GPS-GSM trackers and/or radio beacons are installed on the model. A tracker is a device with a SIM card and a GPS sensor; it is capable of transmitting its coordinates to cellular telephone by calling the SIM card number or in real time. A radio beacon is a device that emits radio signals with a certain intensity and at a certain frequency. To search for a radio beacon, a direction finder is used (usually a walkie-talkie). Trackers TK102, V520 and radio beacons from various FPV equipment manufacturers are popular among FPV pilots.

Other tricks

These are just the basic questions for beginning FPV pilots. As your project progresses, new ones will definitely appear. It is impossible to cover all of them within the framework of this FAQ. But here are some tricks that may help.

  • Place the receiver antennas on the model so that during flight their polarization coincides as much as possible with the polarization of the transmitter. This is important for long-distance flights.
  • Before turning on the equipment, turn on the video transmitter; some equipment can scan the frequency and find a more suitable range for communicating with the receiver.
  • Plan your meals wisely on board the model and on the ground. Sometimes it makes sense to use a separate battery to power your FPV equipment. It is also worth paying attention to various DC-DC converters and BEKs, ferrite rings for protection against interference.
  • Read the forum, ask questions, use the search and find answers to your questions.

Very often, novice pilots ask the question: “What do I need to buy to fly ultra-long distances of several tens of kilometers?” There is no answer to this question. There is equipment that, theoretically, when used correctly, allows such flights, and practical experience of flights at 30-50 and even 60 km confirms this. However, no one, including the manufacturer, gives any guarantees that you will succeed in such flights. You must understand that not everything is solved by the coolest equipment. And even perfect assembly is not a guarantee of your success. There are factors that depend only on the pilot himself (planning a flight strategy, taking into account the wind and the orientation of antennas), and there are factors that do not depend on the pilot at all (for example, the clarity of the air in the direction of your flight). But don’t forget that good luck accompanies the persistent and persistent!

Happy FPV flying!!!

publication of materials is possible only with indication of the source

Hi all. Today's review will be interesting for those who are interested in PC topics. Since I also love flying drones, I decided to find a device to view the picture and record it at the same time. Each drone uses an fpv analog camera with a 5.8 GHz video transmitter. To satisfy my desires, I purchased an fpv receiver for a phone or tablet - Eachine ROTG01 UVC - for testing.

Arrived in a metal box. The kit includes a special USB cable, a dipole antenna and the receiver itself.





During the test, it turned out that this receiver is not suitable for iPhones and some Android phone models. Before purchasing, download TestUVC_0.5.apk. It will tell you exactly whether this receiver will work with your device.
To work, we need to connect the cable correctly. The gray arrows should point towards the receiver (see photo).


Next, install the application for recording video and viewing it. I recommend (PoKeFPV), it's free!
First, we connect the receiver, then we launch PoKeFPV and with the only button on the receiver we start searching for channels. When you hold it for a long time, auto search is activated.



There is no blue screen. The reception frequency is displayed at the top left and the signal strength as a percentage on the right. When the receiver scans all 150 channels, the screen displays the channels that are already in use. A very useful function. For example, when several people are flying and in this way you can find the optimal frequencies so as not to interfere with each other during flights.
Recording is carried out in avi format, 640 by 480 pixels and a frame rate of 25 per second. The quality of the recording can be assessed in my review.

Conclusion
pros
-The receiver is well suited for beginners and those who do not want to invest a lot in the rc hobby.
- Low price, No blue screen, recording fpv and using it as a black box!
-Also suitable for viewing by your friends when you use more expensive systems.
Minuses
- All phones are not supported!
Thanks to all)

I'm planning to buy +40 Add to favorites I liked the review +25 +43