I design the analog front-end, route the PCB, write the firmware, and bring it up on the bench. Most of my work sits at the boundary between biosignal sensing (EEG, ECG, PPG, EMG) and embedded systems — ARM Cortex MCUs, low-noise mixed-signal layout, BLE wearables, and the occasional Linux-class SOM carrier.

Based in Islamabad, Pakistan. Studying at COMSATS University. Available for biosensor hardware, medical-grade PCB design (SI-aware multi-layer), and firmware R&D.

📫 hiibrarahmad@gmail.com · LinkedIn · Portfolio · Fiverr

Carrier board for the INVENSOM-6UL (NXP i.MX 6ULL) Linux SOM, designed for a clinical handheld dermatoscope by Revive Medical Technology. Routed in Altium with attention to the camera/display lanes, power sequencing, and form-factor constraints of the handheld enclosure. _{Stack: Altium · i.MX 6ULL · Embedded Linux · multi-layer PCB}

Two-board wearable: a main board around the Nordic nRF5340 with IPS + e-Paper displays, BLE 5.3, IMU, BME680 environmental, and CCS811 air-quality sensors — plus a wireless charging board with BQ51003 Qi receiver, BQ25100 charger, and MAX86150 PPG/ECG sensor for heart-rate + SpO₂. _{Stack: Altium · nRF5340 · BLE 5.3 · MAX86150 · BQ51003 · Qi 1.2.4}

Pin-for-pin UNO-compatible board on 2-layer FR4. Modernized with USB Type-C, CH340G serial bridge, full shield compatibility, and through-hole headers for hobbyist rework. The board you reach for when you want UNO ergonomics without the legacy USB-B. _{Stack: KiCad · ATmega328P · CH340G · USB-C}

• ⬆️ Pushed 1 commit to main in hiibrarahmad/QAR — Improve long-range tracking reliability · 5d ago
• ⬆️ Pushed 1 commit to main in hiibrarahmad/QAR — Replace MindTune branding with hiibrarahmad · 5d ago
• ⬆️ Pushed 1 commit to main in hiibrarahmad/QAR · 5d ago
• 🌱 Created branch main in hiibrarahmad/QAR · 5d ago
• ⬆️ Pushed 1 commit to main in hiibrarahmad/JL701N_LUNIX — PB1 touch: maximize CH1 sensitivity for extreme detection · 2026-07-03
• ⬆️ Pushed 1 commit to main in hiibrarahmad/JL701N_LUNIX — PB1 touch: fix inverted veto logic, prevent LP sleep on false RAISING · 2026-07-03
• ⬆️ Pushed 2 commits to main in hiibrarahmad/JL701N_LUNIX — PB1 touch: calibration-free IIR-drift veto for PC3 reliability · 2026-07-03
• ⬆️ Pushed 1 commit to main in hiibrarahmad/JL701N_LUNIX — Fix PB1 touch: debounce RAISING so PC3 doesn't glitch HIGH · 2026-07-03

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