Simple Touch Sensitive Switch Circuit Diagram

This is a Simple Touch Sensitive Switch Circuit Diagram. A touch switch is a type of switch that only has to be touched by an object to operate. It is used in many lamps and wall switches that have a metal exterior as well as on public computer terminals.

Touch Sensitive Switch Circuit Diagram


Touch Sensitive Switch Circuit Diagram


A high impedance input is provided by Ql, a general purpose field effect transistor 741 op amp is used as a sensitive voltage level switch which in turn operates the current Q2, a medium current PNP bipolar transistor, thereby energizing the relay which can be used to control equipment, alarms, etc.

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