Powering lilliput from psu and relay from car
Just about to install my car PC and basicly this is what i want to do.
I want to power my screen from my m2atx - which is fine i made a molex plug and plugged it in no problems. But, i want the ignition to control on and off. So power from m2atx but switch off and on depending on ignition status.
Theres been some threads about this when searching but i couldnt find astraight answer.
When i got the screen i got a relay and something else with it for car use the relay that says 5A and 12vdc. its got 8 pins on it. i know the bottom 2 are for the relay ground and pos (i think its +5v it needs or am i wrong)?
I connected 2 of the other pins to a molex for power and that seems to be giving 12v no problems, Then 2 of the other pins go out with 12v when its active, BUT, what i dont understand is, The wires are curently going out to this:
Then come out of it into a barrel plug. So basicly, What is the use of this black box and do i need it? and am i doing things right? sorry if its abit basic.