TOUCH CONTROLLED LOAD SWITCH

ABSTRACT

The project is designed to develop a touch sensitive switch to control any load. A

555 timer is used in monostable mode to drive a relay to switch ON a load for fixed time

duration.

The 555 timer is triggered by a touch plate connected to its trigger pin. The output

of 555 delivers logic high for a fixed time interval as decided by the RC time constant

connected to the timer. This output drives a relay which in turn switches ON the load for

that duration after which is switches OFF automatically. Human body induced mains

supply develops a voltage on the touch plate to trigger the timer.

BLOCK DIAGRAM

HARDWARE REQUIREMENTS:

Resistors, Capacitors, Diodes, 555 Timer, Relay,

Lamp.