Recreating The Mac SE Logic Board

When [Kai Robinson] found himself faced with the difficult task of saving as many Mac SE’s as he possibly could, the logical but daunting answer was to recreate the Mac SE logic board for machines that would otherwise be scrapped. These machines are over 30 years old and the PRAM battery often leaks, destroying parts and traces. Given that the logic board is a simple through-hole two four-layer board, how hard could it be?

The first step was to get some reference photos so [Kai] set to desoldering everything on the board. The list of components and the age of solder made this an arduous task. Then a composite image was produced by merging images together using a scanner and some Inkscape magic. in graphics software.

Rather than simply putting the pins in the right place and re-routing all the netlists, [Kai] elected instead to do a copy, trace for trace of the original SE board. [Kai] and several others on the forum have been testing the boards and tracking down the last few bugs and kinks in the design. An unconnected pin here and an improperly impedance matched resistor there. Hopefully, soon they’ll have Gerbers and design files ready for anyone should they need a new logic board PCB.

It’s no secret that we love the Macintosh SE here at Hackaday. We’ve seen new custom cases for it and now new PCBs for it. It does cause the mind to ponder though and wonder, what’s next?

Thanks [Toru173] for sending this one in!

WiFi On A Sprint Pixi

The Sprint version of the Palm Pixi doesn’t have a WiFi option but the Verizon version (called the Palm Pixi Plus) does. The hardware is almost the same and [Gitit20] figured out how to do some hardware swapping to add WiFi. The radio board inside the phone is fairly easy to remove. Close inspection of the Sprint radio board shows some solder pads where a WiFi chip would go. The Verizon version has this chip, and moving that radio board into the Sprint phone will enable WiFi. This is strictly a hardware hack as the device identification¬†(IMEA) is paired with the motherboard and not the radio board.

Now we want to see someone source that WiFi chip, solder onto the board, and enable it within the OS so that we don’t need a donor phone to make this work.

[Thanks Juan]