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The circuit below is used to connect a relay to the arduino UNO to control high voltage electronics.

Step 1: Parts

  • A Relay (SRD-12VDC-SL-C)
  • A 10K Resistor
  • A IN4007 Rectifier Diode
  • A BC548 Transistor

Make the circuit according to the schematic provided.Enjoy!

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