68kMLA Classic Interface
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| Click here to select a new forum. | | Hybrid schematic | Posted by: at0z on 2020-10-26 07:50:41
In my wading through Google search results, I came across this GitHub project to map out the schematics for the Hybrid board, and a project that will go into KiCad. It might help someone and I figured you can never have too much information...
https://github.com/ppieczul/macintosh-portable
| Posted by: desertrout on 2020-10-26 08:12:50
Yes! Super cool to have a KiCad version of the schematics available - even a color pdf - especially one that has a slightly different perspective on the power system.
However, use with caution, as it may be reverse engineered using a faulty hybrid - as most (all?) of them probably are suspect at this point, to one degree or another. techknight has taken a quick look at this and has already noticed a few inconsistencies with his own understanding:
Transcription errors in these kinds of projects are also a concern as well.
| Posted by: at0z on 2020-10-26 08:52:43
Yes! Super cool to have a KiCad version of the schematics available - even a color pdf - especially one that has a slightly different perspective on the power system.
However, use with caution, as it may be reverse engineered using a faulty hybrid - as most (all?) of them probably are suspect at this point, to one degree or another. techknight has taken a quick look at this and has already noticed a few inconsistencies with his own understanding:
Transcription errors in these kinds of projects are also a concern as well. I think as it's a Git project, if you notice anything amiss, report it back so it can be corrected and we all win as a village 🙂
| Posted by: techknight on 2020-10-26 08:53:59
I was going to soon as I found the motivation. the trouble as I mentioned in the other thread, those resistor values change and drift, especially when exposed to electrolyte and thats what causes the failure.Â
| Posted by: desertrout on 2020-10-26 14:07:28
I think as it's a Git project, if you notice anything amiss, report it back so it can be corrected and we all win as a village 🙂 100%
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