I have on order an LED driver and I want to use it as a simple 12v DC output to control a Solenoid Valve. The Driver says Constant Current & Constant Voltage. I obviously don't want 1A pumped into the Solenoid. I will of course put a Diode in to protect against back EMF.
Have I chosen the wrong type of Transformer?
I will be using a relay to switch the solenoid on and off with the output of the LED Driver as the feed to the solenoid (I will probably put the relay on the input side of the LED Driver so it is not always on).
Thanks in advance.
Best Answer
It's not clear if the power supply you've chosen is constant current or constant voltage type. Also it's not clear how clean is the output of the power supply, being LED specific, it might be outputing some nasty triangle wave as usually LEDs don't care and chinese manufacturers don't care, but solenoid would care - in the worst case it be switching on and off rapidly.
In any case, you will not be pushing 1A via solenoid rated for 540mA, provided output of the power supply does not go higher than 12V, so it's safe to test it.