Linear regulation. +12V / -12V /+5V. Up to 1A.
This is a project I started a couple years ago. While I’m very satisfied with my Mini Dual Power Supply, I needed a stronger one.
This power supply is based on the classic Linear Regulator family, 78xx and 79xx.
It’s divided in 3 distinct parts:
- Right after the transformer output, you find the diode bridge rectifiers.
- Then comes the filter section, with the big capacitors.
- Finally, the linear regulators.
This PSU needs a 12V, 1A per rail, dual winding transformer, toroidal or regular.
For example: Toroidal transformer 30VA 2x 12V, 2 x 1.25 A
Be careful! Mains power supply voltage is highly dangerous and potentialy lethal!
Input: 4 wires, separate windings, screw terminal on K1.
Outputs: +12V / -12V /+5V, screw terminal and Eurorack 16 pin connector.
Layout:
The PCB is 10 x 10 cm wide.
PCB:
Examples of a completed board:
Download the schematics and build instructions (PDF).
I also sell a couple of kits, check my store on Tindie.
