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

Picture of 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

Picture of Needed Tools

Needed tools

  • Iron Soldering
  • Third Hand Soldering Solder Iron Stand
  • Wire Stripper

Step 3: Solder the Copper Coins and Create the Circuit

Picture of 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

Picture of 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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Comments

Sy333 (author)2016-04-23

will any conductive material work instead of a coin ?

YouOnlyL1 (author)Sy3332016-05-08

Hey.. thanks for your comment...

Of course .. :)

Sy333 (author)2016-04-23

also can the ne555 timer be used

Alexisgm97 (author)2016-03-03

Nice project, yet so simple with our old friend the Timer 555!. I will make it too.

Greetings from Spain :)

YouOnlyL1 (author)Alexisgm972016-03-07

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 (:

Alexisgm97 (author)YouOnlyL12016-03-07

I will subscribe! I love your intro with the leds and the resistors! :)

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