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The circuit is used a relay wthe arduino to control high voltage electronics.

Parts........

Relay (5 VDC)

2.2 K Resistor

330 ohm Resistor

green led

IN4007 Rectifier Diode

BC547 Transistor

Step 1:

Step 2: The Schematic

<p>Made it. Relay works but the led doesnt light up. Iam not sure about my knowledge of schematics so i just put the led plus to +5v and the minus between relay minus and the 547b, resistor is there too. dont know if its correct though. but great instructable thanks!</p>

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