Introduction: Touch Sensitive Toggle Switch Circuit
Build this simple Touch Sensitive "toggle switch" with only 2 CMOS integrated circuits, CD4077 quad Xnor gate and CD4013 dual D-register. Circuit is very sensitive, and standby current ( led off ) is under 0.5 mA @ 6V supply.
Output can be easily modified to drive relays, power mosfets/transistors and triacs.
Step 1: Circuit at Work - Watch Video for Details & Waveforms.
Step 2: The Complete Circuit Diagram
IC1: CD4077 quad CMOS Xnor gate
IC2: CD4013 dual D-register ( you will be using only one )
Q1: BC558 PNP transistor
Bat: 6 >20v 0.5mA @ 6v (led off)