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Mehdi-Ldj/README.md

Mehdi Hassan LADJELATE

Electronics & embedded systems — PCB design, RF, firmware

ladjelatemehdi@gmail.com · LinkedIn · Champs-sur-Marne, France


I design complete boards — schematic, multi-layer layout, controlled impedance — and the documentation that makes them manufacturable: stackup, BOM, DRC/DFM checks, fabrication notes. The three below are Rev A, design-complete.

Currently finishing an M2 in Electronics (3EA) at Université Gustave Eiffel, after an M2 in Computer Engineering. Looking for a 5–6 month end-of-studies internship from April 2027 in electronics, RF or embedded R&D, anywhere in France.

Boards


LoRa / BLE sensor node

Ø55 mm
868 MHz + 2.4 GHz · 50 Ω CPW
solar + LiFePO₄

USB-C dock

130 × 85 mm
7-port USB 3.2 Gen 1 + GbE
90/100 Ω · per-port sensing

CAN / RS-485 gateway

73 × 33 mm
STM32F072 · isolated CAN 2.0B
isolated half-duplex RS-485

Each PCB opens in KiCanvas — the board in the browser, no KiCad installation required — and each schematic ships as a PDF that reads end to end. Every repository carries a BOM; the two controlled-impedance boards also document their stackup and fabrication.

What I work with

  • PCB — multi-layer boards, controlled impedance (50 / 90 / 100 Ω), split ground planes, KiCad 10, stackup selection and DFM review
  • RF — grounded coplanar waveguides, match/filter/balun front ends, PCB antennas, 2D quasi-static pre-check; 4nec2/NEC and CST/HFSS from coursework
  • Firmware — C/C++ on STM32, bare-metal and RTOS, embedded Linux, USB, CAN, I²C, SPI
  • Instrumentation — oscilloscope, logic analyser, signal generator, lab supply, VNA, soldering and rework

Repositories

Repository What it is
lora-ble-sensor-node Off-grid agricultural node. Bare nRF52840 (aQFN73) with an on-board BLE antenna, SX1262 at 868 MHz behind a switchless match/filter/balun with a U.FL measurement point.
usb3-dock Self-powered dock around a 7-port USB 3.2 Gen 1 hub and Gigabit Ethernet, with five INA219 on 0.1 Ω shunts — one per external port — and latched per-port protection.
usb-can-rs485-dongle Isolated diagnostic gateway for industrial buses: STM32F072 with ADM2582E and ADM3053, split host/field ground domains, no copper under the isolators.

Popular repositories Loading

  1. usb-can-rs485-dongle usb-can-rs485-dongle Public

    CAN-485 diagnostic gateway — rev A hardware

    1

  2. lora-ble-sensor-node lora-ble-sensor-node Public

    Off-grid LoRa/BLE sensor node — 868 MHz LoRa, 2.4 GHz BLE, solar/LiFePO4

    1

  3. usb3-dock usb3-dock Public

    USB-C dock — 7-port USB 3.2 Gen 1 hub, Gigabit Ethernet, per-port power sensing

  4. Mehdi-Ldj Mehdi-Ldj Public

    Electronics & embedded — PCB, RF, firmware

    Shell