Friday, August 6, 2010

Toggling Touch Switch

With just one single IC and that also not a digital one ,as one would expect,this switch would from probably one of the austeriest ever made.

The circuit described here allows any electric or electronic devices to be remotely switched on and off just by touching the touch plates.This not only ensures higher safety,but also lends elegance and gives them a longer life.The circuit uses the internal flip-flop of the 555 timer.The two touch plates are used to switch on/off the relay,which controls the relay .Though a 9 volt relay has been recommended,voltages after replacing the relay can be varied from 6 to 12 volts.

The load that the circuit can support depends upon the rating of the relay contacts.The circuit can work on a simple unregulated power supply.The only care that needs to be taken is that the circuit must not be connected to touch plates using wires longer than three meters . The wires used for these connections must be shield in order to prevent false triggering.

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