Tagged Questions

4
votes
2answers
185 views

For switching 220VAC, is a specific coil voltage and coil resistance better than another?

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 ...
0
votes
4answers
494 views

Which relay switches can be activated by the parallel port?

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 ...
1
vote
2answers
625 views

How to interpret voltage/current for relay?

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 ...
1
vote
4answers
1k views

Can a Computer Motherboard Speaker/Buzzer output voltage switch a relay?

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 ...