DIY Power Supply Board

This custom-designed PCB lets you build your very own Apple Macintosh SE/30 or SE AC-DC power supply using all-new, modern components. Back in black.

Key Features:

• Compatible with Apple, Sony, and ASTEC versions of the PSU
• No need to harvest components from original PSUs
• Optional pre-assembled cable to connect this board to the analog board
• Includes external fuse for additional safety
• Simple build with few components, all through hole construction
• BOM cost for board ~$44 from major online electronic stores depending on configuration (Apple, ASTEC, Sony)
• Project info conveniently printed on the back of the board
• Drop in bespoke design for the PSU enclosure with minimal impact to the original hardware - keep the original board intact
• Choice of power modules to install to the board to lower the build cost
• Optional LED indicator

The design has been bench tested using an SE/30 outfitted with a PDS 68040 accelerator and Ethernet board and SCSI emulator board. During A/B testing this design has been observed to have less CRT image ripple over a Flex ATX PSU commonly used for PSU modernizations.

Specifications

Input: 110 - 240 VAC

Output (Configuration Matrix):

What You're Getting:

This listing is for the bare PCB and cable assembly as pictured. You can also purchase a completed cable assembly in the add-on options list or buy the components to build one yourself. The board components and PSU enclosure are not included, but the board comes with the info you need to start your build via the GitHub project page.

Prefer Fully Assembled?

If you would like to by a built version of this power supply, check out this Tindie product page.

FAQ

Q: I want to replace my Mac SE/30's PSU. What should I buy?

A: There's a bunch of options, from repairing the original, or building this board, to dropping in a fully assembled modern PSU. It depends on your comfort level and budget. This DIY board is intended to give hobbyists and collectors the option to build their own high quality power supply.

A preassembled board of this design may be available is available here. There is also a Pico ATX SE PSU model "T.N.T." listed here as a lower cost option and is also available as a bare board. If there is a particular need for the 5 V rail to run higher than 4.8 V, the Pico ATX 5 V rail runs slightly higher than 5.0 V at its output to compensate for the voltage drops that typically occur when the power is distributed through the system.