Pedalboard Powering issue

[jkokura]

I'm not a fan of SMD, but this one looks like it could work, but it won't work off a direct wall supply. I'd have to use some other sort of power connection I think.

http://ca.mouser.com/ProductDetail/Cooper-Bussmann/POE13W2X12-R/?qs=sGAEpiMZZMvwUzoUXIIvyXqcQFP%2fzU6c47qVQQS%252bVBg%3d

Jacob

[RobA]

For example, looking at this transformer, do I have it right that I'll get two taps of 500mA, or just one tap of 500mA off of this?

http://www.mouser.com/ds/2/410/FP24-250-223587.pdf

Jacob

My interpretation of the GGG docs and the spec sheet for this one would be that you could get two isolated taps of 250mA each from that part

I'm not a fan of SMD, but this one looks like it could work, but it won't work off a direct wall supply. I'd have to use some other sort of power connection I think.

http://ca.mouser.com/ProductDetail/Cooper-Bussmann/POE13W2X12-R/?qs=sGAEpiMZZMvwUzoUXIIvyXqcQFP%2fzU6c47qVQQS%252bVBg%3d

I  think these guys are weird. They look to be designed to be run by a switching controller IC that generates a PWM AC voltage using a mosfet switch (like the way a charge pump works). But the frequency of the AC is really high. I think it would work, but you'd have to build a circuit based around one of the controller IC's. If you use an AC signal of the right voltage level but a normal low frequency 50/60Hz, it'll burn 'em up. I actually tried it with a smaller version of one of these designed for a 12V input from a controller IC. I put a 60Hz 12VAC on it and it smoked it in about 5 seconds.

The circuits to run the controller IC's aren't complicated, but they have to be laid out dead correctly on the PCB or they get noisy or don't work right. The IC's are also a bit expensive. When I added up the costs of the IC's, transformers, inductors, etc, they ended up being in the same price range as the self contained 5V to 9V Recom parts. That's part of the reason I've decided to go that direction.

I think some of the Triad or Amveco type transformers would fit into a 125B height enclosure if you can go that big. I haven't seen one of the nano boards in person, so I don't know how much space you've got underneath. I've been playing with a few of these power supply ideas for a bit now and none of the transformers I've got would fit in a 1590B. I've got a couple that are really close, but they are just a tiny bit too big.