Tag Archives: PCB

Sinclair QL – modifications for EPROM

Posted on December 19, 2020 by Administrator

I have Sinclair QL, “issue 5” with 3 EPROM chips. One of the chips is riding on the other chip. And yes, it is the original solution from Sinclair engineers- they were pressed by Apple computers new product and they … Continue reading →

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Real easy Video fix for ZX Spectrum +2 (gray, “Toast Rack”)

Posted on December 19, 2020 by Administrator

I bought a ZX Spectrum +2 gray (toast rack) for my retrocomputer collection and it was the fail. The video output was bad and also there is a serious problem with RAM or ULA. But this article is about making … Continue reading →

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Cutting PCB panels for new universal STM board

Posted on September 19, 2020 by Administrator

I’ve noticed, that Chinese made “Blue Pill” PCB has fake chips. Some chips are with smaller ROM and RAM size, some chips behaves a bit strange. Also, several mine projects are getting bigger and bigger. Recently, I acquired several bigger … Continue reading →

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PCB world is getting smaller

Posted on December 24, 2011 by Administrator

PCB component are getting smaller and smaller. Hobbyist must learn how to handle such miniature components and how to solder it. Some small parts are already described in old Lithuanian article about soldering LED driver on selfmade PCB. Next PCB … Continue reading →

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Selfmade double sided PCB at home!

Posted on June 15, 2005 by Administrator

To make double sided PCB at home you need: double sided photoresist coated PCB material, some NaOH solution (in mine case- simple drain cleaner), some PCB etching solution (HNO3 in my case), some PCB software, good printer, some transparency foil, … Continue reading →

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