Here I’ll describe my activity concerning electronics & hardware projects. Some of my projects are on GitHub only, link to my GitHub profile in the footer.
Replacing VGA and PS/2 with HDMI and USB in a Belkin rackmount KVM console
I modified the 17" Belkin OmniView 1U Rack-Mount Console to have USB and HDMI inputs instead of traditional VGA and PS/2.
Long-lasting UPS setup with APC Smart-UPS and car batteries
I connected a server-grade UPS with four car batteries to create a cheap solution for non-stop operation of a server rack cabinet for over 12 hours in the event of a power outage.
Automatic USB mains switch for USB-controlled power strip
Almost all available USB-controlled power strips use 5 V from USB to drive the relay. This is of no use with recent PCs, which hold 5 V during sleep mode. I've written alternative firmware for the popular DCT Tech USB relay module available from AliExpress, which detects bus inactivity and shuts the relay down when the PC is in sleep mode.
Microlab speaker IR remote hijack - autostart and input select
I use Digispark module to inject NEC infrared protocol commands to start Microlab 6C speakers and select sound source automatically at startup.
Paramotor helmet with headset
Skateboard helmet, accompanied by Peltor earmuffs and communication equipment, is a legitimate alternative to expensive off-the-shelf paramotor helmets, which are, in fact, built on the same principle. I use a military-grade differential dynamic microphone to achieve superior speech intelligibility.
Cheap flight computer combining Kobo Mini and BlueFly Vario module
Using e-book reader Kobo Mini with BlueFly Vario is a cost-effective alternative to off-the-shelf paragliding variometers. I built one with a custom 3D-printed case.
Octoglow VFD - Fallout-inspired display
This grand project mixes modern technologies with obsolete ones like vacuum tubes and germanium transistors. Basically, it is an informational display heavily inspired by Fallout games, which you can put on your desktop.