24 Mar 2013

Clear air forward scatter optical kit

The schematics below are of the RX and TX used in the recent "over the horizon" NLOS 481THz optical tests. As you can see, not too much complexity involved considering the useful science that results. All parts are inexpensive and readily available. Nothing critical apart from the PIN photodiode and the 280000mcd red LED which I got from Hong Kong via eBay. 100mm optics used at the TX and RX ends.

The 481THz receiver
The 481THz beacon transmitter

1 comment:

Bert, PA1B said...

Hello Roger, the schematics are fairly simple, but you have a lot of fun. Good luck in the "cold and dark". 73, Bert