Smart Simple Touch Switch Circuit Diagram

The circuit is quite sensitive because we have used the two transistors as a darlington pair. Here is a project of a simple touch switch circuit. A very simple touch switch circuit diagram can be constructed using this circuit schematic.

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This touch switch circuit is composed from an current amplifier and a decimal counter circuit.

Simple touch switch circuit diagram. Here the stable stage is low so the timer outputs low after the trigger is removed. Simple touch alarm circuit using 555 ic here the circuit diagram for a piezo sensor based touch alarm. We can build them easily.

The led will be on for the time during which the trigger is present. The counter circuit is a cdb490 type and is capable to show at pin 12 states 1 and 0 that depends by the pulse applied of pin number 14. Unlike from normal 555 touch plate switch the piezoelectric touch switches are more sensitive and accurate in action.

The gain is first amplified by the first transistor and then further. Our bodies have resistance. Because of using basic components transistor ujt and popular ic like 555 timer 4011 cmos flip flop ic.

We just touch the sensor lightly. It makes the current flow through the circuit is changed. This circuit and can also be used to activate a relay in the place of led and resistor.

This circuit will turn on off an electronic relay using the same touch sensor. This simple touch switch is developed by using 555 timer ic operated as a monostable vibrator. Basically in this circuit we will have a led which turns on when we touch a pin of timer.

Simple touch switch circuit circuit diagram. Pulses applied to pin 14 are provided by the current amplifier formed by that two bc. The circuit consists of 7555 ic which is the cmos version of the 555 ic.

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