Touch Switch With Lm555

by Zero The Null in Circuits > Electronics

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Touch Switch With Lm555

|| LM555 || TOUCH SWITCH ON-OFF

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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Schematic Diagram and Needed Items

Touch Switch.bmp

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

Needed Tools

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Needed tools

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

Solder the Copper Coins and Create the Circuit

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Solder the four copper coins for using touch plate and create the circuit as you see in schematic diagram.

Last Steps

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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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