RPi-PSU R2

Make your own Raspberry Pi – PSU [R2]

I received my Raspberry Pi PSU Revision 2 PCBs in the mail last week and I got a chance to populate and test them during the weekend.

The R2 board is shared on OSH Park which means you can order your own boards and assemble for yourself.

Components

Here’s the board, fully populated and with all the parts values highlighted.

RPi-PSU R2 - Components

All parts are fairly common, specially the passives. Here are a few suppliers for the parts you may have a hard time finding.

ATTiny85

SparkFun: COM-09378 Mouser: 556-ATTINY85-20PU

Programming

You will need a way to program the ATTiny, I suggest getting yourself an Atmel AVR mkII, a Pocket AVR Programmer or if you already own an Arduino you can make an ArduinoISP.

LD33V

SparkFun: COM-00526 Mouser: 511-LD1117V33

TIP125

Mouser: 511-TIP125

2N2222A

Mouser: 511-2N2222A Digi-Key: 497-2598-ND

OBSOLITE R3 replaces this component with the 2N3904 and PN2222

Resources

OSH Park: http://oshpark.com/shared_projects/clqtxZaD Video: http://youtu.be/xgsn7Mpjh7g

4 thoughts on “Make your own Raspberry Pi – PSU [R2]”

  1. I’m looking at the schematic and have a thought, would a MOSFET be feasible as replacement fir TIP125 and 2N22222? A 2-3 amp MOSFET in a SOT23 package should decrease the size of the PCB.

    /Mats

    1. Hey Mats! I do have an all SMD FET version of this board, it’s not released yet. For this through-hole version though, I went with a TIP125 since it was easier to source locally and I needed a bunch for a workshop I gave.

      1. That makes sense… Thanks for publishing your design. And as I saw another post about lower the power consumption on the Pi by removing the onboard voltage regulator and replace it with a LDO with higher efficiency. But I feel that you are on that track with your undisclosed board.

        Kind regards Mats

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