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Thanks for the tip Tony. Kind of what I was thinking but a picture makes it easy. Dave

The classic polarity reversing is usually a motor hooked up to a DPDT switch, like this: https://www.eleinmec.com/figures/012_01.gif Replace the switch with a 2x3 header and a couple of jumpers, and

I would still strongly recommend a polarised connector. Somewhere down the road, someone (it might even be you) will have to look at your PCB; you wouldn't want them to think, "What was he thinking?"

I was thinking something like that with the multiple jumpers or those 2 position switch banks but that would be overkill (the dip switches). I just wasn't sure how to draw it up. I like good habits

Ok, just trying to encourage good habits.? You might want to consider putting a silk screen outline of the part (you draw it) on the board, or add two spdt style (middle with two ends) jumper pads

Harvey, ? In my case the circuit is so simple no harm can be done but I do get your point. From the batteries to a jack with a female plug. Inside the box the jack is hardwired to the pcb. The only

I would not use reversing a connector for the fix of an LED installed backwards.? I'd be very tempted to check them first. Most of what I use has an index mark on it indicating the cathode. If you

Bertho, ? Funny story. :) But in my case I was hoping and also using my JST connectors, there was a way to reverse polarity. Of course putting together the project correct would be ideal, but in the

Harvey, ? I buy from Amazon a lot but I also price check them a lot too. I have had pretty good luck with them and if something goes awry, they fix it no problem. Dave

One trick is if you have a three pin connector is to use the center pin for positive and the two outside pins connected to ground. Then polarity does not matter. Another common thing on multipin

Try amazon and connector assortments.? You'd be surprised how many there are, and how many don't have what you want.? I always (if possible) go for amazon shipping because the "sold by amazon" has a

Ok, thanks for the info. I was just making sure a device doesn't exist like a special switch that could do the same. But I can make it work if I need to. Using single wires to plug power and ground

If the connector is keyed, and you really can't plug it in backwards, then you don't need symmetric pins.? Some connectors can be forced in backwards. There are keys that fit into the connector in

Thanks Harvey. It all makes perfect sense now that I remembered the VIA. One bonus round question. What if you wanted to reverse the polarity and you had a connector ( 2 pin ) that was "keyed" so you

yet more replies.....

Interleaved some more. ??????????? The .1 inch (2.54mm) spacing should work ok with the JST 2.5mm spacing, at least for short length stuff. SO I should be good there. I did look at premade

Donald, ? My needs are still simple as I am just getting started with SMT and pcb's at limited times due to too many hobbies and other work. :) Simple led circuits and my last through hole pcb just

It depends entirely on your needs. If you need to power both circuits simultaneously, then (obviously) you need to connect power supply and return (it's not ground unless it is really attached to the

Interleaved. Instead of JST, I use 0.1 inch spacing connectors.? The female/female jumpers can be tweaked to remove the individual shrouds, and can be reinserted in strip connectors to make some

Harvey, ? I have a related question here after spending some time researching. I already have a bunch of JST XH connectors and plugs, and pins and the crimper. I wanted to design a total SMT pcb and