When we are building our circuits and DIY guitar stompboxes, power supply polarity is extremely important. Boss guitar pedals makes sure that their power adapters supply continuous power through a center negative power supply. This means that the input jack must be wired correctly in order for the circuit to function. Using the wrong polarity power adapter can, at worst, destroy the circuit! Many older designs do not prevent users from doing this!
The video contribution from YouTube channel DIY Guitar Pedals has a related video on how to transform your 9V battery-powered guitar pedals into a much cheaper, power-supply-powered circuit.
After watching this video, you should also check out our article on DIY center negative power supplies: https://www.diyaudiocircuits.com/center-negative-polarity-dual-power-supply/.
Also, check out our schematic for a 5V center negative power supply: https://www.diyaudiocircuits.com/diy-center-negative-power-supply/
Until next time, happy hacking!
