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

Master Category List - Dave's Circuits
Last Updated on: Monday, April 21, 2008 04:18 AM


Light Detectors
 
40KHz Light Detector with High Ambient Light Immunity
This circuit is designed for detecting infrared light modulated at around 40KHz.  It’s feedback scheme cancels much of the DC component from ambient light.  It’s conversion factor is about 100 millivolts per microwatt of 900nm light.

Click on Drawing Below to view PDF version of Schematic

40Hz Light Detector with High Ambient Light Immunity designed by David A. Johnson, P.E. (Dec 15, 2004)

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

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