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More  Bistable Multivibrator or Flip/Flop Circuits 
Capacitance Touch Switches

Micro Power Circuits     Photo Flash     Switch Circuits

 

TOUCH ACTIVATED SWITCH NEEDS 1.5 VOLTS


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 Drawing Below to view PDF version of Schematic

Circuit 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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