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Arduino: NOT-Gate Circuit

Learning : Electronic NOT-Gate Circuit
Subject: To Build a NOT-Gate Circuit using BC547 Transistor

e are working on Electronic Devices, Voltage, Resistors and other Electronic Parts that may Become HOT due to un-stable current or Wrong Wire Connections..

In this Project we will use the BC547 Transistor to build a NOT-Gate circuit, so we will Not use the ADRUINO board.

What we Need

  • 1 2Pin Push-Button.
  • 1 LED
  • 3 Resistors.
  • 1 BC547 Transistor.
  • 1 BreadBoard. [I am using a small 5x7cm]
  • Some Jumper Wires.


  • Connect the BC547 BasePin to a Resistor Pin1, Then the Pin2 of the Transistor to the Push-Button Pin1.
  • Connect the Push-Button Pin2 to Another Transistor Pin1, Then the Pin2 of the Transistor to BC547 CollectorPin, AND to the Battery(+).
  • Connect the third Transistor Pin1 to BC547 CollectorPin, and the Pin2 of the transistor to LED(+) Pin.
  • Connect the BC547 EmitterPin to the LED(-) Pin by Jumper-wire.
  • Connect the LED(-) Pin to the Battery(-).
Here is the Circuit on the Breadboard
arduino circuit NOT-Gate ali radwani

Since this is a NOT-Gare Circuit then once we connect the Power we can see the LED turns ON, Now if we Press the button and keep pressing, the circuit will be in connecting phase and the LED will tune Off.

Here is a GIF clip of Running Time.

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ali radwani ahradwani.com python projects codeFollow me on Twitter..

By: Ali Radwani

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