Go Down

Topic: Connect external power supply (Read 216 times) previous topic - next topic



I want to supply 12 V to an device. I want to control the power supply over an relay.
Which parts do I have to order to connect a normal 12 V power supply to the bread board or directly to the relay?

Thanks in advance.



Does the relay have a 12V coil?  If the relay requires more than 5V or more than 40mA, here is a transistor-driver circuit.

Some relays have a low-current 5V coil and they can be driven directly by the Arduino.   In that case, you only need a "backwards" diode across the relay coil to kill the back-EMF (high voltage kick) when the relay is switched-off.

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131