Questions tagged [printed-circuit-board]

All about PCBs: repairing, making replicas, troubleshooting, drawing & original documentation, etc.

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Did anybody use PCBs as macro-scale mask-ROMS?

Early on, even fairly small ROM's were quite useful. For example, you could fit a minimal upper-case only font for a terminal into something like 256 bytes. And that's a scale that a human could lay ...
wrosecrans's user avatar
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4 votes
0 answers
159 views

IDE interface board design review [closed]

Hope this is ok here. This seems to be the place with the real hardware experts. As some of you may recall, I've been trying to get a 44 pin IDE SSD module working on a retro IDE interface. The SSD ...
eesz34's user avatar
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31 votes
2 answers
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What is the Commodore 64C "France version" and why does it need a beefy resistor?

While perusing the schematics for the Commodore 64C (titled COMMODORE-64 B/NE) I came across a suspicious section of the power supply: The unregulated "9V" is connected to the completely ...
pipe's user avatar
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9 votes
1 answer
1k views

What was the first computer board to be wave-soldered?

The Wikipedia article on wave soldering does not give any information on its history. What was the first computer circuit board to use this process? I am specifically looking for computers that were ...
DrSheldon's user avatar
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3 votes
2 answers
544 views

How did wave soldering work? [closed]

While it is not used as much nowadays, wave soldering was a big advance in the productivity of manufacturing electronics, compared to soldering all the components by hand. It consists of placing all ...
rwallace's user avatar
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1 vote
1 answer
172 views

Need help with lifted pads/traces on a TRS-80 Model 100 PCB

The worst imaginable thing you can think of happened. I've tried making a minor repair and it all rolled downhill like a snowball and now I have significant damage. Extent of Damage The pads got ...
Travis Wells's user avatar