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  1. M

    Cheap and simple ADB to USB converter

    Should be fine, both use Atmega32U4 which is the magic sauce required for emulating USB devices.
  2. M

    Reverse Engineering the Macintosh LC III Logicboard

    The designers get to choose exactly how these two grounds are bonded, maintaining control over the flow of return currents at all frequencies. Otherwise you're leaving it to chance how high frequency return currents make their way back to the power supply. I've actually experienced this...
  3. M

    Classic / Classic II ATX power conversion.

    Merry Christmas.
  4. M

    Classic / Classic II ATX power conversion.

    So it stayed like that until basically two days ago when I found some time to look into it again. In the mean time I ordered some parts, a "PicoATX" PSU that takes an input of 16-28V or whatever, I don't like the look of the 12V input ones, as I'm guessing they just pass the 12V through which...
  5. M

    Classic / Classic II ATX power conversion.

    So... after moving house and finally reaching the end of the year, I finally had some time to look at this again. But a catchup story first.. I did order a bunch of components and try to fix the ABs, I can't remember where I got to with the C1/EAB but the C2/LAB I made some progress after...
  6. M

    Classic / Classic II ATX power conversion.

    Here's a couple of pictures that show what's going on better. I've ordered cables and a different dc-dc to make an adapter harness. Turns out some Lenovos use 14p molex, and ATX adapters are readily available, so I'll just move pins around and splice wires accordingly.
  7. M

    Classic / Classic II ATX power conversion.

    Hello, I am new here. Figured I'd jump in with something outrageous. Preamble: I've acquired a non working Classic and a Classic II with early (EAB) and late (LAB) analogue boards respectively. I have recapped both ABs and LBs.  The LAB would blow the fuse immediately, eventually 'solved' by...
  8. M

    Homebrew PRAM Batteries

    Kia ora. This is my first post on this forum. I thought this might be a good place to start, I've built a 2032 -> 1/2 AA adapter using veroboard and an appropriate holder. The metal terminals are made from solder lugs from 4mm "banana" sockets. But bits of terminal strip for 18650s would...