SOLVED Help needed please turning on a 12 volt bulb using arduino uno

Other Hardware General Electronics
1

Hi and apologies for my stupidity. I am trying to turn on and off a 12 volt bulb and need to do this with the arduino port, i have no problem with the code side but cant figure out how to do the electronics, any help will be appreciated. Many thanks

Moderator edit: topic title fixed

2

The Arduino itself (the processor) don't work with 12V. So, you must help it with a little of electronics. You can use a relay, or you can use a transistor:


relay


transistor

You need to connect one or the other circuit to 12V. You need too to know what is the current that the bulb sinks from the source (especially to the transistor circuit).

3

many thanks for your help.

4

Can you please change the subject of the first post to "[SOLVED]..."?

5

And now can you change it again so it says SOLVED and the original name, so folks know what it is that has been solved

Like: "SOLVED: Help needed please turning on a 12 volt bulb using arduino uno"