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

Master Category List - Dave's Circuits
Last Updated on: Saturday, June 28, 2008 01:21 PM


Bistable Multivibrator or Flip/Flop Circuits  Capacitance Touch Switches
 
1.5V TOUCH ACTIVATED SWITCH
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

Touch Activated Switch designed by Dave Johnson, P.E. ( January 18, 2002)

Bistable Multivibrator or Flip/Flop Circuits  Capacitance Touch Switches
Master Schematic Category List - David A. Johnson, P.E.
 

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