This is a Simple Complementary metal–oxide–semiconductor connect switch circuit diagram, CMOS
technology is used in microprocessors, microcontrollers, static RAM,
and other digital logic circuits. This connect switch does not rely on
mains hum for switching-It-can be used with battery powered circuits.
Simple Cmos Connect Switch Circuit Diagram
Schmitt trigger IC1 forms a 100 kHz oscillator and IC2a which is biased
into the linear region, amplifies the output and charges CI via the
diode. IC2b acts as a level detector. When the sensor is touched, the
oscillator signal is severely attenuated which causes CI to discharge
and IC2b to change state.Sourced by : Circuitsstream
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