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More  Comparator Circuits   Light Detectors or Optical Sensors

XENON LAMP FLASH DETECTOR -Feb 15, 2002
 

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.
 

Click on Drawing Below to view PDF version of Schematic

Circuit xenon light flash detector schematic

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 Light Detectors or Optical Sensors

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