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Author Archives: Administrator
AVR103: Graphics module VFD GU140×16
(AI translated) Lithuanian airports disposed of some equipment, and there were devices with VFD screens (the devices themselves were specific, with very strange software). At least I got the VFD screens: Noritake Itron GU112x16G-7806A V3. I think the software is … Continue reading
CO2 laser tube (bulb)
(AI translated) My CO2 laser has been unused for a couple of years. Its tube degraded and started to weaken. About a year ago, it was still possible to cut paper and make some “applications.” Today I tried again – … Continue reading
LM2596* modules from China
(AI translated) For my latest collection exhibit, I decided to upgrade the power supply – to create something like the LM2596 from an overclocked 7805… Before the postal service went crazy, I bought the cheapest PCBs with counterfeit LM2596ADJ from … Continue reading
RIFA capacitor failure
(AI translated) Anyone somewhat involved with old electronics will eventually encounter RIFA capacitors and their tendency to catch fire. I finally experienced it myself – a peculiar device was working, and I had to walk the dog. When I got … Continue reading
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My 484 enemies
I have 484 enemies… Solder balls, 0.55mm diameter. Just testing my first 4 layer PCB with some second hand FPGA chips. I am using old solder paste to build new balls… but with bad result. Two pins are missing (from … Continue reading
Forbidden NEMA repair
(AI translated) Somewhere, I mentioned that I have a photolithographic (UV-curing resin) printer. But I never mentioned that when I first bought that printer, my relatives decided to move it to another place without my knowledge because it smelled very … Continue reading
HUB08 LED board (matrix) display protocol and interface to STM32F103
HUB08 LED display control protocol explained. Continue reading
Power standard for my computer collection
I have small collection of vintage computers. Several computers do not have PSU, other one have very specific ones. The problem is with some that looks like “standard”, have same connector like others, but have reversed polarity. Like ZX Spectrum … Continue reading
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How to print, preview in VB Studio Express
There is classic basic program for Commodore 64 computer to print maze on the screen. This program random prints “/” and “\” character on screen. I wanted to implement same program on modern computer and print the result. Not only … Continue reading
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