If you a beetle Quadcopter and have lying around a TV in your home, you should in this way.
Note: I have a CNC mill the parts, but you can do this by hand as easily.
Parts you need:
1. Beetle quadcopter
2. Video transmitter 1.2 GHz (in this example), but the camera has the easy way to be. I've built a camera with RF transmitter.
3. Step Converter 3.7 v 9 or 12V depending on the camera type. I use the same battery for the Quad and the camera link.
4. Monitor AV. I have a DVD player NextBase screen 10 "received size. The bigger, the better.
5. Clover leaf antenna for the receiver. Show friends http://rcexplorer.se/diy/2011/08/the-cloverleaf-fpv-antenna/ her instructions. This step is a must if you have a low signal output as 10mW. Can a more powerful transmitter, but it requires more battery and the beetle is a lightweight vehicle. This setup is 100 grams in total.
I have a photo of the receiver with the antenna for 1.2 GHz. It is the larger antenna. I built also an antenna for 2.4 GHz 2-Channel RC transmitter and video link (smaller antenna). Keep in mind, how did the lower frequency penetrate better. 5.8 GHz is cool, but need more power for the same area. Lower band of radio frequencies, which are transmitted materials easier than band frequencies. Lower frequencies are all occupied and reserved for other things. I want a video link system 400-900 MHz band to have, which means affordable videos in HD quality. I am afraid that as the 5.8 HD amateurs permanently will inhibit quality FPV RC band higher frequencies.
NB: the § § thingies are earrings for my girlfriend. Think their profession!
Cost estimate of USD:
Beetle: 30
Video link: 20-25 (1.2 GHz)
DC / DC converters increase: 2.5
JR connector: 1
Plastic 2
free :-) work
Monitor the used DVD player for free! But you can used buy similar to like 20-$40.
Total: ~$ 60 ($100 with used monitor)
Compare this with the shark system.
Future ideas for development.
Buy a high-definition camera with 600 or 700 TVL, for $20.