A touch in this circuit turns-on the lamp or the relay. Power supply is according the lamp or relay. Sensitivity is adjusted by P1. R4 is necessary is some cases, to match the characteristic of the used SCR. Sensor is a small piece of metal or wire.
A touch in this circuit turns-on the lamp or the relay. Power supply is according the lamp or relay. Sensitivity is adjusted by P1. R4 is necessary is some cases, to match the characteristic of the used SCR. Sensor is a small piece of metal or wire.
