The touch sensor of this circuit consists of two plates that must be touched simultaneously so that the switching takes place and the LED lights up. The sensitivity depends on the value of the resistor that can be increased up to 10 M. Never use a source without a transformer. At the circuit output, a transistor can be used to control a relay or a higher power load. The 4001 integrated circuit can also be used, and the power can typically be between 5 V and 12 V.
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