First some pedals have a positive ground scheme where the audio ground of the effect is connected to the positive terminal of the battery usually due to the type of transistors used in the pedal s circuit.
Pedalboard power supply schematic.
Even if you switch them on together the pedals will get equal and unadulterated power resulting in clean and articulated sound results.
You can power up to four standard and one high powered pedal via four 150ma and one 500ma outputs using a phone charger laptop or any usb port.
Each voltage has two outlets but they can be daisy chained with a custom cable to connect many more pedals.
Mimidi guitar pedal power supply 10 dc output pedal board power for 9v 12v 18v 100ma 500ma effect pedal with short circuit protection and overcurrent protection 3 8 out of 5 stars 5 29 99 29.
Mimidi guitar pedal power supply adapter station 8 isolated dc output for 9v 12v 15v 18v effect pedal board with short circuit protection 4 6 out of 5 stars 96 28 98 28.
There are several reasons power supply isolation can be anything from favorable to crucial.
Mission engineering s 529 power converter makes it possible to power a pedalboard via usb.
Its an extreme waste of money when you can build your own power supply for only about 25 the power supply i designed and built delivers steady regulated 12 volts 9 volts and 5 volts all at the same time.