In this project,  when power is supplied to the touch switch circuit, the devices connected to it remain ideal as voltage at pin2 is zero. When the switch is turned ON, trigger pin (pin2) receives trigger signal. The output pin (pin 3) receives a high output due to which transistor gets turned ON. Simultaneously relay…

Touch switch with a 555 timer has been built long before. The basic idea is the 555 timer should be configured in monostable mode and the TRIGGER terminal of the 555 timer is left open as TOUCH lead. The discrepancy in using the design is switching both ON and OFF intentionally i.e. once the lead…

 This project demonstrates the principle and operation of application based on touch sensor. The circuit is divided into three parts: Input, 555 timer and output. A [[wysiwyg_imageupload::]]touch plate is used for the input and output can be seen across an LED or a buzzer. Some application of the circuit include touch based blinking lights, touch buzzer, touch switch etc.This circuit can be used in the following applications: 1. To detect stray voltages produced by mains or to detect electrostatics build up in a room.2. To make touch buzzers. 3. To implement touch switches like for a bell.