Marvelous Touch Switch Circuit Diagram

Because of using basic components transistor ujt and popular ic like 555 timer 4011 cmos flip flop ic.

Touch switch circuit diagram. This circuit will turn on off an electronic relay using the same touch sensor. Pulses applied to pin 14 are provided by the current amplifier formed by that two bc. Thus by touching through the contact points a b and c d the appliance connected through the relay can be switched on and off.

This tiny current is amplified in magnitude by the transistor and enough current flows through emitter to collector and led glows. Parts required for making a simple touch sensitive switch circuit. There is many how to make a simple touch switch circuit diagram.

One end of the bulb is connected with the common terminal of the second switch and another end of the bulb is connected with the neutral line of the ac power supply. That is way we are presenting two circuits diagram 1 with single transistor and 1 with two transistor tiny current flows through the skin when touch conductor is touched by finger. In this circuit a n channel mosfet irfz44n is used as switching element.

1 x 3 3 mω resistor 1 4 watt 1 x 1 mω resistor 1 4 watt 1 x bulb with holder regular or cfl 1 x 5v relay module if relay module is not available then you need the following components 1 x 5v relay. This touch switch circuit is composed from an current amplifier and a decimal counter circuit. It makes the current flow through the circuit is changed.

When we touch through the points c d the gates again becomes high and switches the transistor off. Our bodies have resistance. 1 x 555 timer ic.

This switches on the transistor q1 and the relay gets activated. As you see in the 2 way switch diagram below you will find that the phase live is connected with the common of the first 2 way switch. Pin1 pin2 of the first switch are connected with the pin1 pin2 of the second switch respectively.