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Last Updated on: Tuesday, June 01, 2021 03:06 PM

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More  Bistable Multivibrator or Flip/Flop Circuits 
Capacitance Touch Switches

Micro Power Circuits     Photo Flash     Switch Circuits



A single 1.5v silver oxide button cell powers this complete touch activated switch circuit for 5 years.  It features both a normally open and a normally closed set of solid state switch thermals.  It also has an adjustable sensitivity, which can be set for a touch capacitance change as small as 1 picofarad.

Click on Circuit Below to view PDF of Schematic

Touch Activated Switch designed

 by Dave Johnson, P.E. (January 18, 2002)

More  Bistable Multivibrator or Flip/Flop Circuits 
Capacitance Touch Switches   

Micro Power Circuits    
Photo Flash    

Switch Circuits

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