"spark 8217" I'm more of an visual people. Some written explanations I have seen but not images on google\altavista\etc... Don't want to blow my PWM-unitPCB
- If you have time mark +,- on photos and upload them on free picture sites like: Photobucket.com, Flickr.com or such...
There is no standard way of wiring these power connectors. Some equipment uses the centre conductor as + with the outer as - and some equipment uses the opposite.
If you are wiring up both the jack and the socket then you can decide for yourself which way to connect it.
There are three connecions on the socket because it includes a switch so you can detect if a jack is inserted. Plug the jack into the socket and use a multimeter to see which of the three conections is which.
Yes, there is no standard way. One tip you could follow though, is to keep the positive shielded in the center. This way if you happen to drop the plug connector onto a metal table (as we use in optics), you won't short things out. If you don't think that's an issue, then you can go either way. Just be consistent.
Center should used as positive. Because it isn't exposed. If the outside of this connector was used as the positive it could easily grounded during insertion, touching the chasse or just hanging free thus damaging the source supply.