Adjustable power supply using LM2575
Datasheet for LM2575: http://www.ti.com/lit/ds/symlink/lm2575-n.pdf
Hardware
Making SCART cable for ZX Spectrum +2/+3
From: http://www.benophetinternet.nl/hobby/vanmezelf/ZX%20Spectrum%20128K%20video%20fixes%20and%20video%20cables.pdf
Cleaning and repairing ZX Spectrum +3
Got a somewhat cheap ZX Spectrum +3 to my collection. It was marked as untested in eBay ( they usually are ), but I took […]
How to build a hardware startup
Some good readings about hardware startups and starting a hardware business: How To Build A Hardware Startup, Created by Marc Barros (local copy of paper) […]
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 […]
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, […]