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

Master Category List - Dave's Circuits
 Last Updated on: Friday, July 18, 2008 11:34 AM


Freespace or Light Beam Communication      Light Detectors or Optical Sensors
LIGHT DETECTORS WITH AMIBIENT LIGHT COMPENSATION 
These circuits were taken from a few application notes on infrared remote control devices. They use a current compensation method to separate the modulated light pulses from ambient light. They appear to have limited bandwidth and may only work at the 30KHz to 50KHz frequencies often used by TV and VCR remotes. I have not yet tested the circuits.

Click on Drawing Below to view PDF version of Schematic

30KHz -50KHz Light Receiver (July 6, 2000)

Freespace or Light Beam Communication      Light Detectors or Optical Sensors

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

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