Touch Sensor Using 555 Timer Ppt. This simple touch sensitive alarm is developed by using ne 555 timer ic operated as a monostable vibrator. Applications schmitt trigger ppm pwm linear ramp generator.
How The Pin2 Of 555 Timer Triggers This Simple Circuit Electrical Engineering Stack Exchange from electronics.stackexchange.com
Touch sensor switch circuit with 555 timer. Capacitive touch sensing using the properties of capacitors touch can be used as an extremely effective method of input and control. This simple touch switch is developed by using 555 timer ic operated as a monostable vibrator.
Timer can be used in monostable mode of operation or astable mode of operation.
The two main uses for capacitive touch sensors in commercial products today are a simple switch and multi touch input such as a tablet pc or an iphone. 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. This touch alarm circuit will sound when somebody touches the trigger plate.
