Hi evryone!
I had a little problem today. Not so long ago I wrote here asking if I could feed several pedals using a high- current wall wart. I received some answers which concurred that the high current should not harm anything, but I shouldnt exceed the voltage.
I got a 12v- 5A transformer and built a rectifier section since. I measured the output and read 17v. I thought that this would be tamed with a proper load, so I hooked two pedals to see what happened. One of them died, a Boss Overdrive to be exact. The switch is permanently "on", being a FET + flip flop electronic section I bet the culprits are the 2SK30 FETs but I havent pop it open yet. It sure smells burnt from the inside! The other pedals I tried were my own creations and they took the 17v like nothing. I think this kind of switch does not take such an over voltage, my units are all true- bypassed... what you think? As for the power supply, what can I do to bring down this beast? Remember its 5A, not a tiny little cell phone wall wart. Can I use a regulator?... Any help will be much appreciated, thank in advance.

Drawing a few miliamperes from a 12V-5A transformer will not take the voltage down......

You should use a regulator the get the voltage down, like and 7809 or a LM317 adjusted to 9V.

Are you sure you didn't reversed the polarity on your pedals, most of the pedals should take 17v although they are not designed for it.....

The Boss pedals use 10v caps. That's probably what you burned in there

Never ever put more than 9V on a Boss.

Because once you let all the smoke out, it'll never work again.

Yup, electronics run on blue smoke :mrgreen: lol