Hi, I am looking for a 12v 5a d.c power supply having 50ma output, to operate a relay coil and thus a 12v 5a motor. Please tell me where it is available and what is the cost? Or give me a circuit to make one.
Let's see, you want a 12v, 5A DC power supply that has a 50mA output?
This doesn't seem to make sense. Do you mean that it needs to have something like a "voltage good" signal in order to operate the relay coil?
It's not good to operate a supply at 100% capacity. You should use a supply rated for more than your load.
Also, motors draw many times as much current when stalled (or starting from a stop) than they do when running at speed with no load. Is the 5A specification the stall current or the no-load current, or something else?
I thought he just wanted a power supply to use for powering both the relay and the motor..
Just an 12V 8A or 10A or whatever power supply. (5A+50mA+safety factor)
Its a small customized motor which draws a current 5A max.
Also need to power a relay(load 50MA max.)
Please suggest the best power supply can be used.