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

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Last Updated on:  08/09/2009 09:02:08 AM

Comparator Circuits   Light Detectors or Optical Sensors

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XENON LAMP FLASH DETECTOR
This circuit uses a small 2.5mm square photo diode in conjunction with a 100mH coil to detect the short light flashes from a xenon lamp.  The coil makes the circuit immune to normal room lights.  Its 10mv sensitivity can detect light flashes from a range of over 100 feet.  Reflections from a room’s walls and ceiling is usually enough to trigger the circuit.  The entire circuit draws only 3 Microamps from a 6 to 9 volt battery.

Circuit xenon light flash detector schematic

Light Detectors or Optical Sensors
Master Schematic Category List - David A. Johnson, P.E.

 
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