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Macintosh 128K/512K/Plus INTERNATIONAL analogboard recreation (820-0107-D)

Posted by: daanvdl on 2024-04-24 06:06:45 I've been working on recreating the INTERNATIONAL (revision D) analog board for quite a while. This INTERNATIONAL board can be reconfigured to both 110V as 240V, although i have not test 110V setup yet. This revision board should be able to replace any revision (A/B/C/D) board, both US as INTERNATIONAL. Although there is a lot of information about the US board to be found on- and offline, there is nearly no information about the INTERNATIONAL 240V boards. Larry Pina do refer to 'INTERNATIONAL' boards in his books, but I discovered that this refers to the first revision INTERNATIONAL board and that these do not correspond to the later variants like the later 820-0107-D revision. So i decided to start from the beginning; I did reverse engineered the 240V power circuit and did redraw schematic which is used by this board. The power schematics are added to the GIT repository. I did add a 'usual suspect' section and added BOM to the GIT repo which should help by troubleshooting non-working 240V boards to bring them back to life on new boards. After deploying multiple boards, finetuning the recreation and continuing implementing improvements the day has come: I finished my work and published it to my github. The files, schematic and BOM can be found overhere: GitHub - daanvdl/Macintosh-Analogboard: Macintosh 128K/512K/Plus Analogboard recreation (820-0107-D) Macintosh 128K/512K/Plus Analogboard recreation (820-0107-D) - daanvdl/Macintosh-Analogboard github.com Have fun with it! Cheers, Daan

Posted by: LaPorta on 2024-04-24 07:47:07 Very nice! It is amazing to me how many people make these sorts of things for the community.

Posted by: RetroTheryboy on 2024-05-10 06:38:51 Fantastic work, are you releasing the gerbers , as there does not seem to be a set visible , or is there another way to get this?

Posted by: daanvdl on 2024-05-10 13:01:47 I did made some improvements. I will publish a new release tomorrow!

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