Category Archives: MCU

ARM36: Bubble LEDs

Posted on December 27, 2024 by Administrator

(AI translated. Orginal article from 2022.06.15) Antique LED Indicator, probably from some Soviet calculator. Its imperfection is charming: The symbols are tiny (hence the plastic lenses), the brightness is minimal (at saving currents). But it’s charming in its own way. … Continue reading →

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Anything with palm and BT (Bluetooth)

Posted on December 23, 2024 by Administrator

(AI translated from 2022.05.24.) There isn’t much time to write anything properly, so here are a few random photos: Oh dear, those are “keemkės”! Russian and Soviet palladium with platinum. This is some kind of coaxial splitter. Probably powerful. This … Continue reading →

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ARM35: LCD and FSMC on STM32Fxxx

Posted on December 23, 2024 by Administrator

(AI translated from 2022.05.02) Short prehistory: we collected some PCBs with STM32F103 chips and an unknown LCD. The LCDs were of two types, and the PCBs were also of several variants. Some had another STM32 BGA chip and ROM/RAM chips. … Continue reading →

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Purple pill STM32F PCB

Posted on December 18, 2024 by Administrator

(AI translated, original post from 2022.04) Do you remember, I wrote about the remnants? About the mountain of STM32F103VBT chips with slightly bent legs? So, I made an experimental board. I wired ALL the pins to 0.1″ connectors. I also … Continue reading →

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Shortage of Chips, You Say?

Posted on December 10, 2024 by Administrator

(AI translated, from March 25, 2022) A good person reported that they brought some chips. But somehow there was no time—work piled up. After a few days, I went and saw the remnants…. It even squeezed my heart… STM32F103VBT6: Medium-density … Continue reading →

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XRF repair

Posted on December 6, 2024 by Administrator

(AI translated) Continuing while still feeling under the weather (symptoms suggest COVID, but PCR says no), I took another look at the old XRF. I have already somewhat explained how it works and mentioned that the “black fin” isn’t trying … Continue reading →

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AVR103: Graphics module VFD GU140×16

Posted on December 4, 2024 by Administrator

(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 →

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HUB08 LED board (matrix) display protocol and interface to STM32F103

Posted on August 3, 2022 by Administrator

HUB08 LED display control protocol explained. Continue reading →

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8-bit font tool: editor, rotator, mirror

Posted on September 4, 2021 by Administrator

This is small tool writtent in Visual Studio Express VB. Main purpose of this tool is to find 8 bit wide fonts and graphics in various ROM, firmware files and export to binary or C source file. Tool can edit … Continue reading →

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PS2 keyboard for ZX Spectrum (or clone)

Posted on December 26, 2020 by Administrator

ZX Spectrum and other computers of that period use proprietary keyboards with direct connection to some specific chip or connected directly to computer bus. Old keyboards are damaged from elementals or time, and sometimes are not very user friendly compared … Continue reading →

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