Is there any reason why I might choose an EM-relay rated at coil-voltage of 24V or 12V, over one rated at coil-voltage of 5V, all other specs like contact max. current, switching voltage, life etc ...
I'm planning on controlling some external circuits using the parallel port by switching on relays that can switch on the external circuits. Am I right in thinking the pins have a voltage of 3-5V when ...
I look at a relay like this one and see the markings on top but am unsure what refers to the rating for the main circuit and what refers to the voltage needed to throw the latch. Can someone explain ...
Most 12v relays I've come across require 4v to switch on. I don't have a voltmeter handy to test my computer motherboards voltage output, and if it did give out +4v and held a long enough duration ...