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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

Charge Pump Circuits    Crystal Oscillators   Infrared Circuits
 
40KHZ LED TEST SIGNAL GENERATOR
This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals.

Click on Drawing Below to view PDF version of Schematic

40KHz LED Test Signal Generatorr designed by David A. Johnson, P.E. (March 12, 2002)

Charge Pump Circuits     Crystal Oscillators    Infrared Circuits

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

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