Friday, 15 January 2016

Simple real puspose touch switch using transistor circuit

Dear friends, today we are going to learn how to make a Touch Switch ( On and Off switches separated) to use it as a wall socket switch.

There are lot of touch circkts on internet but those ate only one state switch means when you touch they will switch on and when you dont touch they switch off. Our touch switch has separated touch plate for ON and Off and it keep it state until switched off by touching switch off plate. Advantage of this is that you are sure which circuit state you really want, unlike the other touch switch that uses only one plate for on and off. You can replace the bulb with a relay to power up any device.

Part List :-

R1 - 500  kilo ohms 1/4Watt

R2 - 3.9 Mega ohms 1/4Watt

R3, R4 - 5 kilo ohms 1/4Watt

Q1, Q2, Q3 - 2N2222, 9013, or similar NPN transistor

Q4 - 2N4403 or similar (higher the better) PNP transistor

Touch plate - any touch plate for
Lamp - 3V to 6V bulb or relay
DC - 6V battery

Enjoy making such interesting touch switch circkit. If any query arises please ask them in comment section.

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