Re: Building an isolated power supply

Posted by balazs.bencs on Oct 30, 2019; 1:12pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Building-an-isolated-power-supply-tp47640p47645.html

You are right, the whole idea is based on the fact that your AC-DC adapter can put out enough power. I guess this is not a huge obstacle these days, you can easily find an affordable AC-DC adapter which is small in size but can put out something like 12V/3A or something similar. (ebay is filled with them)

Also, I forgot to mention that for example in this day and age where USB chargers are everywhere, you can easily build a PSU, where the input voltage is lower than 9V because you can easily buy 5V to 9V DC-DC converters too, and boom there you have clean power.

On youtube, I saw this pedal PSU which is based around this idea, where you can power the PSU with a phone charger or a power bank, but will put out 9V DC.
https://missionengineering.com/shop-2/products/power/power-529/
I'm pretty sure that they have something similar setup, with isolated DC-DC converters from 5 to 9 V, and you can easily do this with this design too. It really depends on what converter you buy.