Circuit - 3V CAPACITANCE PROXIMITY SWITCH - Circuits designed by David A. Johnson, P.E.

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Faraday Touch Switches

Circuits designed by David Johnson, P.E.
Last Updated on: Friday, March 12, 2010 12:07 PM

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Bistable Multivibrator or Flip/Flop Circuits
Capacitance Touch Switches

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3V CAPACITANCE PROXIMITY SWITCH
This circuit was designed to provide a touch activated switch function without an external power supply. It draws so little power that a single 3v battery will operate the circuit for many years. It is discussed in more detail in the section on Capacitance Proximity Switch Technology.

Click on Drawing Below to view PDF version of Schematic

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