Introduction: Touch Switch With Lm555
The Touch Switch circuit will detect stray voltages produced by mains voltages and electrostatic build-up in a room. Two touch plates are provided and the resistance of your finger changes the voltage on pin 2 or 6 to toggle the 555.
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Step 1: Schematic Diagram and Needed Items
Needed items
- 2x Resistors = 3.3 MOhm
- 1x Resistors = 330-470 Ohm
- 1x Capacitor = 10 nF
- 4x Cooper Coins for touch plate
- 1x Led
- LM555
- 1x BreadBoard
- 1x Some wires
- Power Supply +12Volt
Step 2: Needed Tools
Needed tools
- Iron Soldering
- Third Hand Soldering Solder Iron Stand
- Wire Stripper
Step 3: Solder the Copper Coins and Create the Circuit
Solder the four copper coins for using touch plate and create the circuit as you see in schematic diagram.
Step 4: Last Steps
We place the copper coins in the circuit. Feed the circuit with 12 volts and finaly Touch the coins for on-off the LED.
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Participated in the
Hand Tools Only Contest 2016

Participated in the
Raspberry Pi Contest 2016
1 Person Made This Project!
- talktolearning made it!
6 Comments
6 years ago
will any conductive material work instead of a coin ?
Reply 6 years ago
Hey.. thanks for your comment...
Of course .. :)
6 years ago
also can the ne555 timer be used
7 years ago
Nice project, yet so simple with our old friend the Timer 555!. I will make it too.
Greetings from Spain :)
Reply 7 years ago
Thanks for your comment my friend .. I thought to put on a series of constructions with the LM555 ..So, If u want subscribe to my channel to youtube : https://www.youtube.com/channel/UCNn9wVKFuLAf3g-0f......
Greetings from Greece (:
Reply 7 years ago
I will subscribe! I love your intro with the leds and the resistors! :)