A cheap adapter loses the key release code and the key types by itself. A sticky-key log, why the glitches on letters stopped in the cold and why they may return in summer; microcontrollers and ready firmware (TMK, Soarer’s, ps2x2pico).
The power chip on the DDR5 module itself: how to check the rails for shorts, measure the voltages in the PC (JEDEC and XMP) and start the PMIC without a motherboard. Our readings from the dead module.
Three ways to read a DDR5 module’s SPD, our dumps for comparison, why the Windows file turned out incomplete, ESP32 wiring and firmware.
From the cable and charger to measurements on the board: battery, C8070 / C8069 / U7006 (charging), current from a bench supply, the R3004 button, the U7011 power chip and inductors, the crystal, the display. Pictures from the Samsung service manual and the PDFs themselves.
The eight-channel ICSE014A USB relay is driven by a single byte over a serial port. How to build the byte, a script that switches one relay without touching the others, and a udev rule for a stable name and auto-setup.
How to reflash a Chinese IMAX B6 charger clone with the open cheali-charger firmware: the USBASP driver, ISP wiring, a factory firmware backup, writing, calibration and going back.
An APC SUA1000I with two 45 Ah Varta batteries thought they were flat. A home-made 940-0024C COM cable, constant 0 = FF in a service tool, and a calibration: 250 W for over three hours.
A 32 GB Kingston DataTraveler 102 is detected but reports 0 bytes. What the symptom means, how ChipGenius identifies the controller (SSS6691-B3), the SSS MP Utility service tool, and checking the real capacity.
The printer rejects a refilled cartridge because of the counter in its chip. A programmer from a COM port and two resistors, reading in PonyProg, which bytes to clear and why the serial number must change. Plus the fault that makes the printer print halfway down the page.
A 114 × 162 mm envelope from one A4 sheet: print it with the address, cut it out and glue it in five minutes. PDF and SVG files with and without address fields, how to print at 100 % and how to glue it.