Bench Power Supply - ATX PSU Adapter

I wanted a convenient way to pull common voltages without having to hack apart an ATX Power Supply.

Brian Wigginton

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Description

There's a lot of great material online covering how to convert an ATX power supply into an electronics lab power supply. These normally expect you to cut into the actual enclosure of the unit. This project takes a slightly different approach by using a female ATX adapter which allows you to plug in any PSU into the brick. If your PSU dies, you can just hook-up another one.

The colored banana jacks follow the ATX color conventions for voltages as follows:

- Orange: 3.3v
- Red: 5v
- Yellow: 12v
- White: -5v
- Blue: -12v
- Black/Green: ground

Details

Found this on Instructables: http://www.instructables.com/id/Computer-Power-Supply-to-Bench-Power-Supply-Adapte/?ALLSTEPS

Components

10 × Colored Banana Jack Plugs (Assorted Colors) http://www.digikey.com/product-search/en?pv183=2968&FV=fff40016%2Cfff80087%2C1140004&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=500
1 × Female 24pin ATX Connector https://www.sparkfun.com/products/9497
1 × Illuminated 12v Switch http://www.radioshack.com/product/index.jsp?productId=3097458
1 × 10Ω 10W Resistor http://www.digikey.com/product-detail/en/SQP10AJB-10R/10W-10-ND/18735
1 × Radioshack 6x3 Project Enclosure http://www.radioshack.com/product/index.jsp?productId=2062282&cid=ip%3Asem%3Arso%3Agoogle%3Aradioshack_project_enclosure&stop_mobi=yes&utm_campaign=RSO_SRC_EN_NCA_TM_E_Hobby_Do_It_Yourself&utm_source=google&gclid=Cj0KEQjw1NufBRCx8ayaqY2t6KkBEiQA2nLWmz755YFEKbVU9AurGNNm7WhZFiIzupSKUmEPTfJ2INgaAnnw8P8HAQ&utm_medium=ppc&gclsrc=aw.ds

View all 7 components

Discussions

Adam Fabio wrote 08/26/2014 at 05:46

Nice project! How warm does the resistor get during use? If you're on the 5v line, it's only going to have to dissipate 2.5 watt, but that's still dumping into a closed plastic enclosure.

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zakqwy wrote 08/22/2014 at 17:47

Wow, great idea. Wish I had done that instead of hacking apart my PSU's case. Does the breakout box include dummy load resistors?

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Brian Wigginton wrote 08/22/2014 at 18:33

Just updated the components list. I used a 10Ω 10W Resistor to put load on the green connection which is hooked up directly to the switch on the front.

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Bench Power Supply - ATX PSU Adapter

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