Very cool. I recently discovered a need to get ride of noise from pedals. This explains much! Thanks

Never thought about this test , well done

Apart from power supply hum, It is surprising just how much noise is generated within the guitar itself - even on a guitar like mine which is humbuckers only. Now of course this is where a basic, inexpensive and small noise gate pedal at the very beginning of the pedal chain can work wonders. Often we can blame hi-gain pedals when in reality they are simply amplifying the interference delivered to them from the guitar - that guitar noise may sound very low when connected straight into the amplifier, but those hi gain pedals will pick it up and multiply it greatly - each pedal in the chain boosting the original guitar noise some more. A small budget noise gate can be picked up from ebay for little money - and it will quickly earn its place at start of the pedal board.

The Dell power supply is smart. if it doesn't detect a draw it doesn't power on..

You're a genius man!

Nice! Thanks for the video 👍 Cheers // Wince

Hey that's a pretty solid idea imo. My cheap daisy-chain power supply is too noisy to be useful, just the fix I was looking for.

where can get 12v regulator?!?

That's great, but you also need to make sure that the voltage regulator isn't noisy. ;-)

hello @zenmusicuk :)

Hmm... Interesting ah,, totally no noise ah?

what about Iso power supplies with IEC AC inputs?

That's just the difference between switched power supplies and transformer power.

Do we have the exact reason why a computer power supply doesn't bring noise? is there a specific shield treatment?

But did you test it after building your project?

I found a better way to use a power bank with a usb to 9v step up adaptor and problem solved.

it is just DC going through.. this is a rubbish test