via this auction"This sale is for (1) Linear Power Supply PCB. The buyer has to source the parts needed and build this unit themselves. This Power Supply is adjustable so you can calibrate the exact voltage you want.
When everything is built you have one clean Regulated Linear power supply capable of 1200mA depending on the transformer used and if you followed the recommended heatsink install.
******Be Aware that this project requires you to work with a Transformer. You will be working with voltages that can be lethal.*****
This Project is recommended for people who have built power supplies already using Mains Transformers, and would like a pro quality PCB.
Here are the specs:
Outputs: -12v, +12v (or you can adjust for 15v format), you get (1) Universal one (terminal block) and a Euro Format 16 pin IDC location.
Inputs: (1) AC center tapped input where you connect the transformer's Secondary. A Fuse is recommended for the Mains line on the Primary of the Transformer.
Daisy chained: (1) AC center tapped pass thru to use for daisy chaining another power supply. Remember this is AC.
Input 5v option: (1) Terminal block to connect a 5v Switching Power supply so that you can supply 5v to digital sources.
Daisey chained: (1) 5v Termainal block so that you can daisy chain the other power supplies and pass the 5v DC line.
I added the option for you to install terminal block connectors on the Regulators to make them easily serviceable/replaceable. There are arrows on the pcb indicating how the terminal block should be installed.
The recommended heatsinks get soldered on the pcb for a solid feel. Once you build this power supply you will see how solid it is.
Here is a link to a mouser Bom
https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=aecc670cd8
Almost all the parts are on the Mouser Bom, the only part I could not find was the Terminal Blocks. Here is a link of which ones will fit on the pcb:
http://www.taydaelectronics.com/dg301-screw-terminal-block-3-positions-5mm.html
As for the Transformer, it must be Center Tap kind.
I have used this one with great success:
http://www.radioshack.com/product/index.jsp?productId=2102703
***You will also need 4-40 screws and #4 nuts for the regulators, Heatsink grease is also recommended.
Here are some pictures of the PCB, and an example of one of my builds."
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