Isolated power supply

[balazs.bencs]

Hey guys,

I was trying to figure out, what kind of transformer should I buy for my new pedal power supply, because lately, I've been using a lot of digital stuff (Deep blue delay, Madbean gravity wave, Boss TU-3 tuner, etc..). So far daisy chain was not a problem, but with these pedals, I'm getting that freaking digital noise - which goes away when I'm using separate power supplies, so I definitely need isolation.

I found this little guy while searching: https://cdn.sos.sk/productdata/a9/44/1b18f6bb/47151.pdf
Is there anyone who tried something like this? Looks like it is not that big, and there are regulated and filtered versions of it. I thought 4 or 5 of this could be awesome, and almost everything would be isolated.

[Travis]

Weber has two transformers they sell specifically for this. There are a lot of transformers that you could use, I'm thinking of getting one of the Weber ones myself

[balazs.bencs]

Yeah, I saw that one, but in Europe where can you get one? Shipping is a nightmare from Smallbear :/

[Travis]

Not sure as I'm in the US sorry bud.

If you don't find a better option, I would be happy to ship a transformer to you from the US. Since this is something I'd like to do at some point, I could buy myself one and cover the domestic shipping and just charge you for the transformer and international shipping to you

[Ravenswerld]

I used a toroidal found on eBay...works great have had no probs with it. If you want I can post a schematic.

[balazs.bencs]

I bought a Palmer power supply because I had a couple of gigs coming up and I had to have some decent power supply. But I did not give up on building an isolated power supply. I have a couple spare notebook switching power supplies, which I could use for powering a pedalboard. I was always fascinated by the Gigrig products, their modular power supply system is amazing and they are doing the same thing that I want, and I was always wondering.. what are they using? Cause their isolators are so small! Are they using some small toroidal transformer?

As I was messing around with Google, I found a Chinese site, where they opened up a Gigrig Virtual battery: http://rocksince1978.blog.fc2.com/blog-entry-58.html

I can't see the schematic based on the picture, but it is basically just some caps for filtering, and a RECOM DC-DC converter, (RN0909S) which is doing the isolation, anyone can easily get in on mouser, yay!

I'll start building a prototype as soon parts arrive. I wanted to share this - it should help everyone build an isolated power supply, or .. "adapter" if you will.

Edit: Or you can use something like: Traco power TES 1-1219, which is doing the same thing but from 12v (I have a 12V 2A transformer sitting here, which I could use).