Breakout Board for ATX Power Supply – Benchtop Power Supply

  • Rajkumar Sharma
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  • easy
  • Tested
  • SKU: EL126087
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This ATX Power supply breakout board enables users to use an ATX power unit as a benchtop power supply. The project can be very useful to power physical computing, embedded, microcontroller projects, etc. The board provides 4 different voltages 3.3V, 5V, 12V, -12V, and a slide switch is provided for output ON/OFF. All lines have LEDs. Basically, the project splits 20 or 24-pin ATX power supply connector into 4 different power lines. All outputs are accessible through banana connectors.

Note: The board can also be connected to a very old type of ATX SMPS with -5V output, in this case, use Jumper J1 to select the -5V and CN4 banana connector to provide -5V output. Otherwise, connect the Jumper J1 to GND and CN4 is available as GND output.

Connections and Components info

  • D1 LED-Red Indicates 3.3V
  • D2 LED-Green Indicates 5V
  • D3 LED Do Not Install (Use with old style power supply with -5V Output)
  • D4 LED-Red Indicates 12V
  • D5 LED-Green Indicates -12V
  • D6 LED-Red Indicates Power Goods
  • D5 LED-Yellow Indicates Power Supply Standby Condition
  • CN1 20 or 24 ATX Connector for Power In (Molex Digi-Key # WM20494-ND
  • CN2 3.3V DC Output
  • CN3 5V DC Output
  • CN4 GND or -5V for Optional Old-Style Power Supply
  • CN5 12V DC Output
  • CN6 -12V DC Output
  • CN7 GND

Features

  • 20 or 24 ATX Connector as Input
  • Outputs 3.3V, 5V, 12V, -12V, GND
  • Load Current depends on ATX power Ratings
  • 6X Banana Connectors for 3.3V, 5V, 12V, -12V and 3 X GND
  • Power Good LED
  • On/OFF Slide Switch
  • LEDs for 3.3V, 5V, 12V, -12V
  • LED for Power Good Indication
  • LED for 5V Standby
  • Board Can accommodate 20 or 24 Male Connector
  • Banana Connector Holes 6.5MM with 13MM Solder Pads
  • 4 X 4.2MM Mounting Holes
  • PCB Dimensions 98.27MM x 53.34MM

Schematic

Parts List

NOQNTYREF.DESCMANUFACTURERSUPPLIERPART NO
11CN124 PIN ATX RT CONNECTORMOLEX
23CN2,CN3,CN5BANANA CONNECTOR REDPOMONA ELEC501-1095-ND
33D1,D4,D6LED-RED 3MMAMERICAN OCTO2460-L314HD-ND
42D2,D5LED-GREEN 3MMAMERICAN OCTO2460-L314GT-ND
53J2,R3,D3DNP
61D7LED-YELLOW 3MMAMERICAN OCTO2460-L314YD-ND
71J13 PIN MALE HEADER PITCH 3.5MMWURTH732-5316-ND
81R1150E 5% SMD SIZE 0805YAGEO/MURATA
93R2,R6,R7470E 5% SMD SIZE 0805YAGEO/MURATA
102R4,R51K 5% SMD SIZE 0805YAGEO/MURATA
111SW1SLIDE SWITCHE-SWITCHEG1903-ND
121J1SHUNT FOR JUMPER J1SULINS CONNECT732-5316-ND
133CN4,CN6,CN7BANANA CONNECTOR BLACKPOMONA ELEC501-1094-ND

Connections



ATX Power Supply Pinout

Gerber View

Photos

 

Video

PCB

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