16-year-old electronics, robotics and mechatronics builder from France — you might know my boards by the "MJ" signature on the silkscreen.
I design and build across the full stack: analog & power electronics, PCB design, embedded systems, mechanical design and 3D printing. I learn by building things that are harder than they should be.
CERN — MTA section · January 2025 Developed Python interfaces for an oscilloscope and a function generator. Left with a recommendation letter from my supervisor (available on request).
DepanPac — refrigeration & HVAC maintenance · June 2026 Field diagnostics on customer sites: temperature and delta-T measurements, voltage and capacitor testing on heat pumps and A/C systems. Board-level repair of a customer's faulty control PCB, done in my own lab.
Protocrafted — engineering company · July 2026 Machine learning applied to robotics, and professional 3D modelling.
- 5-DOF Robotic Arm — A 76 cm-reach robotic arm with self-designed cycloidal gearboxes and a custom 6-layer control board (Teensy 4.1 / Cortex-M7 + Raspberry Pi 5).
- High-Power ZVS Driver — A high-power Zero-Voltage-Switching driver, characterized on the bench.
- Discrete 555 Timer — The classic NE555, rebuilt from individual transistors to understand it inside-out.
- Ballistic Simulator — A physics simulation written in Python.
- Web-Controlled Nerf Turret — My very first project: a pan/tilt Nerf turret controlled through a local web interface. Where it all started.
(links coming as I publish each repo)
Everything I build gets designed, soldered and measured in a home lab I've put together piece by piece — oscilloscope, logic analysers, bench instruments, two 3D printers and a homelab server.
Electronics
Analog & power electronics · Schematic capture · PCB design (KiCad, up to 6 layers) · LTspice simulation · Board-level repair & debug · Oscilloscope / logic analyser / LCR characterization
Embedded
ESP32 · Teensy / ARM Cortex-M · Arduino · I²C · UART · PWM · Sensor integration (encoders, thermistors, current sensing)
Mechanical
Fusion 360 · Mechanical design from scratch · Cycloidal gearbox design · FDM 3D printing
Software
Python · Machine learning (applied to robotics) · Data visualisation (NumPy, Matplotlib) · Web interfaces (HTML / CSS)
Infrastructure
Linux · Self-hosting · Networking · Local LLM deployment
I run a self-hosted server with an RTX 3060 (12 GB) for running local LLMs and AI agents, alongside Nextcloud, a NAS, Paperless and Pi-hole. I also run two FDM 3D printers.
None of this would exist without my father — he's backed every project I've started, helped fund them, and been there from the first 3D print to the robotic arm. Thank you.