Arduino nano can not activate a 5V Relay

Using Arduino Motors, Mechanics, Power and CNC
1

I have an arduino nano and I know that the digital outputs work with 3.3v and I have a relay that activates only with 5v.

The question is what can I do to provide the voltage needed to activate the relay coil.

Thank You Guys!!

2

Hi and welcome to this forum.

digital outputs work with 3.3v

Where did you get this information?

All of my Nanos work with 5V and all of the I/O pins are 5V types; the Nano has only one 3.3V pin, but this is not programmable as I or O.

Nevertheless, even if your Nano would come with 3.3V output, pls use a suitable transistor (e.g. NPN type S9014 (45V/100mA) to switch the relay. AND: don't forget the kickback diode parallel to the relay to avoid killing electronics.