This just supplies +/- 12V for Eurorack modulars.
Andrew's build notes are here:
Ok, lets twerk
The PCB receives 12VAC from a plugpack/ wallwart
. The 1N4004 diodes split this into positive and negative waveforms.
The 4700uF capacitors then smooth out these waves
. The 7812 and 7912 regulators then convert the rectified & smoothed
signals to +12V DC and -12V DC and these are fed to the connectors to be distributed to your lovely modules.
I'm using 250v TDK film caps for the four small 100nf caps
Probably a bit overkill, but it's what i had in stock at the time.
Some pics of the 7812 & L7912 voltage regulators attached to various heatsinks.
He also recommended using heatsink paste.