I bought this solenoid from ebay and was wondering how to power it.
It says 12 volts as you can also see from the picture, but I tested it with putting a 9V battery straight to its terminals for a while, the solenoid and battery got hot after a while.
I measured it with a multimeter and it read 9.0 ohms. Putting the multimeter through it measured 0.53 amps. Both with 9V battery
If I had battery eliminator that gave 12V output, what other components would I need to make it not go hot? Do I need some resistors?
And is it possible to get its power usage to a minimum with it still opening using various components?
Can I add lots of resistors and the voltage remains 12?