Circuit: FINGER TOUCH ACTIVATED SWITCH__ Circuit designed by David A. Johnson, P.E.

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Last Updated on: Saturday, December 23, 2017 03:21 PM

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More Capacitance Touch Switches FET Circuits

FINGER TOUCH ACTIVATED SWITCH

It does not get any easier if you want a solid state switch that is activated by the touch of a finger. Two small metal pins route voltage through the finger skin to a MOSFET switch. The circuit is great for situations where a membrane type mechanical switch is not desired.

Click on Drawing Below to view PDF version of Schematic