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Case studies
What I built, the hard part, and how it turned out. Clients under NDA are shown by sector, not by name.
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Magnetic Hall-Effect Keypad Gamepad — Hardware & Firmware
Japanese gaming hardware client
Hardware design and firmware for a magnetic keypad gamepad: 16 analog Hall-effect keys read through two multiplexers by DMA-driven ADC sampling on an STM32F407, with an OLED and rotary-encoder settings menu and USB to the PC.
RISC-V Thermal Printer Firmware (Grozzi Brand)
Mass-production firmware for globally distributed Grozzi-brand thermal printers using JL Technology RISC-V SoCs. USB, Bluetooth, BLE, and Wi-Fi connectivity with ESC/POS and CPCL protocol support. Developed in a CKD manufacturing environment at THT-Space Electrical, Nilphamari EPZ.
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Tell me what you are building.
Fixed-price projects and hourly work, for clients anywhere. Send the scope and I will reply by email.