IBM PCjr ATX Power Adapter

IBM PCjr ATX Power Adapter, US Shipping

ATX2PCjr Kit $15 + US shipping
ATX2PCjr Kit Assembly $5/ea
ATX2PCjr Kit International(outside the US) Shipping Extra $7*

*After getting estimates to three different countries it seems like international shipping always comes out to $14 via USPS. So I've added an option to include an extra $7 for international shipping. If that ends up not being enough or was wrong for your destination then I'll email you to let you know and offer a full refund if the shipping is too much.

If these are sold out please email me at so I can get an idea of how many of these I need to order for the next batch. I can also let you know when the new ones come in.


Open Source

Yes, the design files are all up on Github. I don't lock down my projects so that their continued existence is reliant on my input. The EDA and CAD files needed to make these from scratch are all in there.


Q: What is a PicoPSU and/or where can I get one?


Q: I have a 3D Printer, can I order this without the printed parts for a lower cost?

A: The cost of the printed resources come out to about $0.25. I'm not even including it in my pricing model. So you're getting them for free anyway.

Q: With this I can power all my side cars without a power side car right?

A: I am strongly recommending against that. The PCjr system board wasn't design to handle high power delivery through the expansion connector. I don't know what the consequences of doing so would be.

What you get

Assembled Version

  • The power board ready to plug in
  • Two 3D printed rear panels for ATX or PicoPSU use
  • A cabled switch to be installed in a 3D printed panel with mounting screw

Kit Version

  • The power board PCB
  • Molex 20-pos Mini-Fit jr connector (ATX Power)
  • Amp 4-pos connector (floppy power)
  • 3-pos 100mil pitch male header (fan connector)
  • 2-pos 100mil pitch male header (switch connector)
  • Two 3D printed rear panels for ATX or PicoPSU use
  • A panel mount switch (power control)
  • 2-pos 100mil pitch female header (switch connector)
  • 2 wires (power switch)
  • Shrink tube (power switch)
  • Screw (power switch)