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DroneSchoolopt

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ANATOMY OF FPV AN INSIDE

ANATOMY OF FPV AN INSIDE LOOK AT THAT “FROM THE COCKPIT” EXPERIENCE BY GERRY YARRISH PHOTOS BY PETE HALL If you fly multirotors, it doesn’t take long for you to hear the term “FPV,” and many have already discovered how much fun this onboard video feature can be. The acronym “FPV” stands for “First-Person View,” and the equipment needed to enjoy that “from the cockpit” video experience has become one of the most popular add-on packages available today. Though several mini and micro quadcopters are now coming with First-Person View function as standard equipment, you can add aftermarket FPV gear to your quadcopter if it isn’t equipped with it. Let’s take a closer look. BASIC OPERATION FPV requires a mini video camera, a video signal transmitter, a video receiver and a video monitor or video goggles. As with anything else involved with RC, quadcopters, and other multirotors, it is always going to be easier to start with a complete FPV package where everything is designed to work together. If you buy each part by itself, you will have to figure out how to make all the connections with a custom homemade wire harness, or adaptor, which may require soldering wires and connectors together. As a rule, for your first time out, stick with a plug-and-play package. Above right: Hobby King’s RC832 5.8GH plug and play FPV set comes with everything you need except a monitor. Below: There are several sources for aftermarket FPV equipment, and here is an excellent 2.4GHz setup using mixed and matched brand products. Video Camera Most of the compact lightweight cameras used in FPV setups come with inexpensive plastic lenses. Once your system is set up, you may have to focus the camera so you have a sharp image to video. Most have a removable/adjustable lens, and to focus it you have to loosen a set screw and then carefully screw the lens in or out to bring the video image into focus. It is also here where you can improve your optics, as there are replacement lenses available made of glass and with different viewing specs. For the best experience, use a wide-angle lens. Available in all shapes, sizes and price points, whichever camera you get will have to be wired to your airborne power source and the FPV transmitter. Note Spektrum’s ultra micro FPV camera to the left comes with a built-in transmitter and antenna. 12 RotorDroneMag.com

Airborne Video Transmitter This is the part that converts what the camera sees into a video signal that can then be transmitted down to the FPV ground station. The camera is connected to the transmitter with a wire lead and it is important to match the wires properly. With a plug and play setup, you simply plug the connectors together. For a mix and match, the color of the wires becomes very important. The wiring for FPV is the same as with all electronics. The black and red wires are the ground (-) and power (+) wires respectively. The other wires leading from the camera will be yellow (video signal) and if there is fourth (white) wire, it will be the audio signal. Transmitters for FPV systems are relatively small and compact. Some quads come with the equipment integrated while others can be upgraded with aftermarket add-ons. Your ground station can be anything from a set of goggles that have a built-in receiver to a table top supporting the FPV receiver of your choice. Various antenna arrangements are used and here you can also fine-tune choices for the best signal reception possible. WARNING It is very important to first attach the antenna before applying power to the transmitter unit. The antenna is required to load the unit’s circuitry. If you apply power to the unit without the antenna attached, you can overload and burn it out. If in doubt, always follow the directions. Ground-based Video Receiver This is the matching part of the transmitter that receives the video signal transmitted from the FPV-equipped aircraft. It too is equipped with one or two antenna, and they should also be connected. Once the video transmitter and camera are powered, some transmitters will automatically lock on the video signal while others have a switch for selecting the clearest, strongest signal. Some cameras/transmitter may have channel select switches. Matching the channels provides the best signal reception. Transmitters produce a lot of heat, so be sure to install them where there’s proper airflow to cool them down. Monitor The ground-based video receiver will have an output jack that plugs into a standard AV (audio/video) cord. The cord connects the monitor to the receiver unit. Again, you have to match the colors of the jacks, yellow for video and white for audio if your FPV camera/ transmitter is equipped with a microphone. When it comes to seeing what your FPV camera is looking at, you have a lot of choices. Standard flat monitors are very popular and like the smaller one to the left, can plug into your ground-based receiver. The larger one below with dual antenna is a combination of monitor and receiver. It even has built-in rechargeable batteries!

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