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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
Last Updated on: Friday, April 25, 2008 04:12 PM

Freespace Communication Circuits   Transimpedance Amplifiers
 
Air Transparency Monitor, Xenon Flash Receiver
I designed this circuit many years ago to monitor the quality of a mile long column of air for future optical communications experiments. The transmitter system (circuit 72 below) uses a powerful xenon flash in conjunction with a large 12 inch fresnel lens at the transmitter end and a matching 12 inch lens with a PIN photo diode at the receiver. The receiver system was connected to a weather station and a computer to collect the changes in intensity of the light flashes under different weather conditions. It has the potential for a 30+ mile range. I have also used this system to conduct cloud bounce experiments.

Click on Drawing Below to view PDF version of Schematic

Air Transparency Monitor designed by David A. Johnson, P.E.

Freespace Communication Circuits    Transimpedance Amplifiers

Master Schematic Category List - David A. Johnson, P.E.
 

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