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

Master Category List - Dave's Circuits
 Last Updated on: Friday, August 29, 2008 02:34 PM


Light Detectors
 
40KHz LASER BURST DETECTOR
This circuit was originally designed to detect weak flashed of laser light bounced off of a fabric video projection screen. It was used as part of a firearm training system. It generates a 100mS output pulse whenever it detects a 3ms to 5ms-laser burst, modulated at 40KHz. It is very sensitive and could be modified for long-range laser communications.

Click on Drawing Below to view PDF version of Schematic

Circuit 40KHZ Modulated Laser Light Detector Circuit designed by David Johnson, P.E.

Light Detectors

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

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