I have a small electromagnet which moves a lever (it's a part from a larger device). I'm not sure of the supply voltage but other parts of the device required 20V.
The resistance of the electromagnet is 53 ohms.
I tried low voltages and nothing happened, but the highest I can try at the moment, 12V, slightly moved the lever.
Is there a way to confirm the voltage required? If it is 20V, will a resistor be needed?