Power Supply question

[lapsteelman]

I'm rebuilding my homemade pedal power supply brick.. It's nothing fancy.. just the usual 3 terminal regulator circuit.  It works fine but what always worries me is I used an AC wall wart to power it and it uses the same 2.1mm connector on the input as the outputs.. I have a tag on the 12 volt AC line to warn me, but I'm always worried that it could accidently get plugged into a pedal and fry it.

Does anyone know of a panel mount jack (and plug) that I could use that would prevent an accidental insertion? I tried a 2.5mm plug, but it still went into the standard power supply jack.

Hope this makes sense... If nothing else I'll just hardwire it

[antonis]

Red & Black cable, perhaps..??

[GibsonGM]

Why not change the AC input to something totally different, like a 1/8" mono PLUG?   No law against it.  Then use the standard barrel-type for power out.

[lapsteelman]

Why not change the AC input to something totally different, like a 1/8" mono PLUG?   No law against it.  Then use the standard barrel-type for power out.

I thought about that... but the 1/8 jacks that I find aren't isolated from the enclosure, which I would need.

[GibsonGM]

Why not change the AC input to something totally different, like a 1/8" mono PLUG?   No law against it.  Then use the standard barrel-type for power out.

I thought about that... but the 1/8 jacks that I find aren't isolated from the enclosure, which I would need.

There must be SOME type that is isolated...somewhere....?    You really could use any style of plug, as long as it's different....like you said, go bigger, get a huge one (over 3mm) something like that...

[bluebunny]

You could get something completely over the top like this:



Same panel cut-out as an XLR chassis connector.

[davent]

I've used little Molex connectors as they are unique, reliable and cheap. Need a two pin, male panel mount and a two pin female line connector.

The two types of pins you need are sold separately  as are the connectors.

http://dkc3.digikey.com/PDF/CA2011/P0226.pdf
Two line just so you know what i'm refering to.


dave

[TejfolvonDanone]

Why not change the AC input to something totally different, like a 1/8" mono PLUG?   No law against it.  Then use the standard barrel-type for power out.

Jack is not a good option as plugging in/out may have a temporary short between the two terminals.

[GibsonGM]

Why not change the AC input to something totally different, like a 1/8" mono PLUG?   No law against it.  Then use the standard barrel-type for power out.

Jack is not a good option as plugging in/out may have a temporary short between the two terminals.

Yeah, probably not the best option,  more an illustration of the many possibilities.    In the real world, I have a ton of computer power supply connectors and such...2 pin things.....I bet with some looking you could come up with something unique.

I do like the "bigger size barrel connector" idea, something you cannot insert the wrong plug into.

[ElectricDruid]

Is there such a thing as a panel-mount male power connector?

One way to do it would be to put a *female* inline connector on the 12V AC, and then you wouldn't be able to plug it into the pedals, since they're female too. But you'd need a male plug on the power brick. Maybe that could be hanging out on a wire too. Maybe that just moves the problem to connecting the AC to the power brick outputs!

like these:



HTH,
Tom