I am making my own little power-failure warning system. So when the power goes off a LED and buzzer goes on.
Right now it looks like this: http://imgur.com/a/oc8vy (Sorry for not making it the right way)
But... The coil is not moving. It's in "off" mode the whole time. And that is kinda strange.
So when I was searching for the error I connected the coil to a 9V battery (even if it's a 5v relay). Then the coil was suddenly moving. So I changed the voltage on the adapter to 9v. But still no reaction.
And YES the current is going trough, because I placed a LED after to see if there was current at all. And it was.
So what could be the problem?
Best regards fiskarn
And well again I connected a LED to the relay-circuit and it was lit. So there's current. Also measured the voltage to 4.9 wich would be enough? But as I said I even tried with 9V and 12V.
Also tried on 3 different relays with the same results.