Kaloyan StefanovThings I've Built
ATX Bench PSU Module – Turn a Spare Computer PSU into a Lab Supply
Turns a spare ATX computer PSU into a bench supply. Plug in the PSU connectors and get 3.3 V, 5 V and an adjustable 12 V rail, each with its own display showing live readings. No wire cutting needed.
Locker Column Board – ESP32-S3 Driver for 16 Electromagnetic Locks
The building block of a modular electronic key-locker system for hotels. Each vertical column of compartments gets its own board, which drives the locks, reads the door-detection contacts, and reports to the Master Board over CAN bus
Locker Master Board – ESP32-S3 Controller for Modular Key Lockers
The Locker Master Board is the brain of a modular electronic key-locker system built for hotels. Room keys are stored in individual compartments with electromagnetic locks, and the cabinet is controlled from the hotel’s own local server
Lutetium