Testing of Clone PI AVR metal detector
Some years ago a have started building Clone PI AVR. Made a PCB, soldered all the components and … and never found time to finish […]
Electronics
Eachine H8 Mini silent mod
I was annoyed with Eachines H8 Mine constant beeping in headless mode so decided to make it silent once and for all. This mod is […]
Reading DHT22 and Light sensor data using NodeMCU dev board
Experimented with reading DHT22 amd Light sensor modules using NodeMCU ESP12E development board. Main problem I had that timer did not work on old firmware, […]
tmr.alarm not working on ESP12E 0.9.5 firmware
Tested that this sample was not working on dev board: if not tmr.alarm(0, 5000, tmr.ALARM_SINGLE, function() print(“hey there”) end) then print(“whoopsie”) end Checked firmware version […]
How to use Arduino IDE to program NodeMCU
1. Install the Arduino IDE from download section of arduino.cc website 2. Run Arduino IDE’s arduino.exe 3. Arduino IDE >> File >> Preferences (Shourtcut is CTRL […]
Repairing ZX Spectrum Kempston joystick
As recently I started tinkering with ZX Spectrum hardware, tested one old joystick I had. Up and right positions did not work during the games. […]
Fixing ZX Spectrum+ 48K (s/n S01-135100) video problems
So, this ZX spectrum was alive, but during testing with some games (for example game “Breakthrough”), I noticed strange video glitch in upper screen part: […]
Another ZX Spectrum 48K
Maybe I got carried away.. but here is another non working rubber keyboard ZX Spectrum I got (s/n D01-257600). Its interesting regarding those serial numbers, […]
Repairing ZX Spectrum+ 48K
Another was ZX Spectrum+ 48K (s/n S01-135100). After turning it on could not see clear image (sorry did not take image of that picture). When […]
Repairing and upgrading ZX Spectrum 16K
Going back into retro computing. Recently got little bit nostalgic and purchased two used non working ZX Spectrum machines. One was 16K, SN 001-201230. Tested […]