Touch Switch Circuit Using 555 Timer. Here the stable stage is low so the timer outputs low after the trigger is removed. In the first circuit pin 2 must see a low for the circuit to activate.
Here the stable stage is low so the timer outputs low after the trigger is removed. This simple touch switch is developed by using 555 timer ic operated as a monostable vibrator. If sufficient static voltage is detected by the plate the chip will change state.
We can use two pieces of a conductor to make the touch plate connected with the trigger pin of 555 timer ic and ground respectively.
You just need to touch the metal plate and the relay gets energised and is kept in this state for about 100 seconds then is released. The led will be on for the time during which the trigger is present. Here the stable stage is low so the timer outputs low after the trigger is removed. Also you can try many of our applications using 555 timer ic.
