How to identify the pins on a DC input socket (jack)? Answered
I have a couple of dc input jacks that i have de-soldered from old electronics, and I now have the need for such a jack as i am making a mini guitar amplifier.
However, I don't know what the connector lugs are each of them, and am not entirely sure whether they are the type with are usually closed (have a switch in them) and only break the circuit to use external power source when a jock is plugged in. I suspect they aren't that sort, because I think they would need more connections than these have.
One has 3 solder lugs, the other only has 2.
Here are some pictures to help make it clearer (sorry for bad photos, with the amount of great light tent instructables on here, you'd have thought i'd have made myself a better macro setup than this by now)