Touch Sensor Using 555 Timer Ic Ppt. Touch the sensing plate of the alarm with your finger and it starts beeping and then stops. It makes the current flow through the circuit is changed.
The 555 timer ic is an integrated circuit chip used in a variety of timer pulse generation and oscillator applications the 555 is used to provide time delays as an oscillator and as a flip flop element it gets its name from the three 5k ohm resistors which give the two comparators reference voltage. Simple touch switch circuit to sense the touch event we don t need complex circuits or micro controllers we can sense the touch by using simple touch switch circuit using timer ic 555 here the touch switch circuit sense the event and makes output led glow and it remains in glow for few seconds and then becomes off condition. This is a very simple touch sensor switch that is build with the 555 timer ic.
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.
Hey guys in this video i m going to show you how to make a touch sensor circuit on breadboard using a 555 timer ic i have tried my best to keep this video. This simple touch switch is developed by using 555 timer ic operated as a monostable vibrator. The led will be on for the time during which the trigger is present. 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.
