FPV (first person view) Part 1

March 24th, 2008 by Speedy Leave a reply »

Hi Guys!

A lot of things happened and i had a little bit of sparetime to improve my MikroKopter with some interesting features. Today the topic is first person view hardware.

My first tests were with a modified 2.4 GHz CMOS camera (10mW transmission power). But the range of the video transmitter (or the quality of the receiver) was not enought to have a stable video signal at ground.

That was the reason for me to buy a 200mW 2.4 GHz transmitter in Hong-Kong and a better antenna for the receiver (2.4GHz 8dBi patch antenna from http://rc-tech.ch) – If you buy components from abroad, be aware of the tax. I had some problem with the import of the 200mW transmitter from Hong-Kong to Austria. But some phone calls and some letters later it was ok 😉 (first i had to pay way too much tax but i received the difference back)

The Video quality of the iTheatre is not enough to fly the MikroKopter only by the video signal. So i have to buy new Video glasses (goggles) with a minimum resolution of 640×480. Otherwise it’s not possible to see details on the screen.

Ok, and here are now some nice pictures of the actual Setup (Transmitter and Receiver):

Top View CMOS camera GPS, COMPASS, FlightCtrl, BL-Ctrl 2.4GHz 200mW tansmitter Groundstation with receiver, LiPo, … 2.4GHz 8dBi patch antenna

The Groundstation has a 3s LiPo to power the receiver and a second (original iTheatre) LiPo to power the Video Glasses.

btw, the antenna (vertical polarized) has an emission angle of 75° horizontal, 65° vertical.

emission angle

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6 comments

  1. Patrick Karamoij says:

    I keep coming back to your site to see the latest developments. keep up the good work on FPV and GPS.

    Greatings from Italy

  2. dr. v says:

    wo bleibt part 2? 🙂

  3. Speedy says:

    Ist schon auf dem Weg von HongKong nach Österreich 😉 Geduld, Geduld

  4. HoverX says:

    Hi,
    Are you using a separate battery to feed the video Tx?

  5. Speedy says:

    Hi HoverX,
    No, the Camera (the earlier CMOS or the “new” Sony CCD) is directly powered by the Lipo.
    It is very important to NOT have parallel cables of the regulators and the video signal. Otherwise the video signal is total messed up, when the motors start.
    If you want you can put a filter between the Lipo and the camera to improve the signal quality.
    In my cases it was not necassary yet to have a own power supply for the camera or the 2.4GHz transmitter.

  6. HoverX says:

    Hi,
    I’m using the EPI-OSD on my mk and still get interferences when I push the throttles. The camera is supplied from the OSD board that already have a filter. What kind of filter would be worth trying? Any web link?

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