Removing supervisor password (SVP) on ThinkPad T42

Recently received two ThinkPad T42 laptops ( some company decided to upgrade its IT and were giving away them almost for free ). After turning them on got an 271 error and later was prompted to enter password. It seems battery was dead on both of those laptops and when its dead, real time clock goes […]

ZX Spectrim 128 +3 composite video output and drive belt replacement

Did some work on ZX Spectrum 128 +3 I have. One thing was I wanted to make it work with small “TFT Color monitor” (for a car rear view). This monitor has a composite video input. First I tried using CSYNK and GND signals for a composite video input. You get the video but it […]

Sony Ericsson that have tx-rx connection

Sony Ericsson that have tx-rx connection: 2218z, A2618s, A2618sc, A2628s, A2628sc, F500, F500i, J200c, J200i, J300a, J300c, J300i, K300a, K300c, K300i, K500c, K500i, K506c, K508i, K600, K608i, K700, K700c, K700i, P800, P802, P900, P908, P910a, P910c, P910i, R300d, R300LX, R300z, R310s, R310sc, R320s, R320sc, R380e, R380sc, R380s, R380WORLD, R520LX, R520m, R520mc, S700c, S700i, S710a, T200, […]

Making an adjustable “lab” power supply from scrap

Had an old power supply board lying around that was ripped from dead/old printer. PSU model is CZ57PSE EPSON To make it work one should connect PSC line to ground. Schematics of similar power supply: To regulate output, made an adjustable voltage regulator using LM2575 that was ripped of some dead router or something similar: Finished […]

ESP12E dev kit “cant autodetect firmware, because proper answer not received.”

After flashing NodeMCU dev kit to latest build could not connect to it with ESPlorer, error was – “cant autodetect firmware because proper answer not received.”. It was because baud rate was changed in later firmware, after setting the baud rate to 115200 all was fixed.

Making old webcam to work on Windows 10

Was investigating some old Fujitsu Siemens Webcam for some project, but it did not work on Windows 10 – windows did not recognize and did not have any drivers for it. Hardware ID in device manager shows: USB\VID_0C45&PID_613B&REV_0101 USB\VID_0C45&PID_613B Searching by vendor and PID did not help. On PCB of the webcam, I found that it […]

Intel i5-8600k 5000k overclocking settings

Mother board MSI PC PRO CPU overclock BIOS settings: Multiplier 50 Voltage fixed to 1.3v RAM overclock BIOS settings: XMP Enabled, profile 2800 Memeory Try it Enabled, Memory Try It Limit selected.

PSU mounting – fan facing up or down

My two cents rant about PSU fan facing up or down when it is mounted in the bottom of the case when talking about semi fan less power supplies. Facing up: Heat goes up. When PSU fan is off, all that little heat will go up directly to the GPU. When PSU fan is on, […]

MasterWatt 650W coil whine when loaded by graphics card

Cooler Master – MasterWatt 650W 80+ Bronze Certified Semi-Modular ATX Power Supply is whining like a bitch when loaded by Gigabyte 1070 G1. When I installed Gigabyte 1070 G1 to my PC and started testing it with various benchmarks and games noticed unpleasant sound from PC case that was related to what was happening on screen (FPS, […]

SanDisk Ultra Flair USB 3.0 64GB Flash drive test

Tested SanDisk Ultra Flair USB 3.0 64GB Flash drive. Realy like this flash drive, good capacity, very good speed and especially super small size. It gets a bit warm when testing but that’s ok considering its size.