Mohamed Hany Afifi

6th of October, Egypt

• Wrote firmware for an STM32-based data logger used in a motor-control research project: peripheral drivers in C, UART and I²C debugging, and documentation.
• Built several PIC16F877A projects: a traction elevator controller, a robot driven by remote control or over Wi-Fi, and multi-mode LED circuits.

STM32 · C · UART · I²C · PIC

• Python automation for small businesses: web scrapers, file processors and simple dashboards.
• Discord bots for online communities (moderation, levelling, mini-games, an in-server economy), running on live servers.

Python · discord.py · web scraping

• A group of friends who build software together. I do most of the code reviews and architecture decisions.

Offline-first Islamic companion app: prayer times and adhan, a 604-page Mushaf with 34 reciters, Qibla, azkar, fasting and Zakat · Google Play · siiraj.vercel.app

• About 102,000 lines of Kotlin in 13 Gradle modules, split into app, core and feature layers.
• Cut the release APK from 126 MB to 32 MB by moving the Mushaf database and 604 page fonts to a resumable first-run download.
• Scheduled the adhan with setAlarmClock and an exact-alarm fallback so it fires on time in Doze; the schedule is rebuilt after a reboot, time-zone change or update.
• Available in English, Arabic, Turkish and Urdu, with right-to-left layouts for Arabic and Urdu.

Kotlin · Jetpack Compose · Material 3 · Hilt · Room + SQLCipher · Media3 · WorkManager

• Sized the inductor (≈150 µH) for 20 % current ripple and the output capacitor for under 2 % voltage ripple at 100 kHz, in continuous conduction mode.
• Closed the loop with a voltage-mode PI controller in Simulink, tuned it against load steps, then built a prototype and compared its waveforms with the model.

MATLAB · Simulink · PI control · DC–DC

• Closed-loop speed control of a brushed DC motor on an STM32F103 with quadrature-encoder feedback and PWM into an L298N H-bridge.
• Discrete PID with integrator clamping and derivative-on-measurement; settles in under 280 ms with zero steady-state error.

STM32 · C · timers · PWM · encoder

• STM32 samples mains voltage and current with ADC + DMA and computes RMS values, real power and power factor per block.
• Streams results over UART to a Raspberry Pi that serves a Flask dashboard.

STM32 · ADC/DMA · Raspberry Pi · Flask

Also

• Line follower robotIR array and PD control on an ATmega328P, on a PCB I designed in KiCad and soldered.
• Three-phase inverter400 V, 50 Hz VSI with sinusoidal PWM; THD compared across modulation indices with FFT.
• Solar MPPTPV + buck converter in Simulink; perturb-and-observe vs incremental conductance.
• Relay coordinationOvercurrent protection for a 3-bus radial network in ETAP, with TCC curves.
• PLC conveyor sortingSensor-based sorting with e-stop and fault indication, ladder logic in CODESYS.
• My JournalMood and task journaling app for iOS and Android, live at myjrnl.vercel.app.

4th year. Relevant courses: Power Electronics I & II, Control Systems, Digital Control, Electric Machines I & II, Power System Analysis, Protection & Switchgear, Microprocessors, Digital Signal Processing.

Advanced engineering courses at Istanbul; a semester focused on computer engineering at Sakarya.

Graduated with 99.3 % · GAT 97 %