Technical Blog
Notes on embedded systems, IoT, PCB and firmware
Linear Encoder 2D Game Controller: Turning Physical Motion into Gameplay
Turning a linear encoder into a physical game controller — and what it taught me about input design and human-machine interfaces.
Building an ESP32 Gree AC IR Remote with Custom PCB and Web UI
A little story about why I built a Wi-Fi Gree AC remote with an ESP32, a custom PCB and a browser UI — and what I learned trying to make it feel like a finished product.
Making an A7670C 4G Module Smart Phone with Touchscreen SMS UI
Notes from building a tiny "smart phone" prototype with the A7670C 4G module, a touchscreen, a dialer and an SMS keyboard — without any phone OS underneath.
SIM800 GPRS MQTT Test: Bringing Cellular IoT Online Without Wi-Fi
Field notes from building a SIM800 GPRS + MQTT test bench: boot, network, GPRS, HTTP, MQTT — all logged on a TFT instead of a serial monitor.
ESP32 TFT 2D Game Display: Running a Game on Microcontroller Hardware
Some thoughts on building a 2D game on an ESP32 and a TFT display — frame timing, partial redraws, input lag, and why a tiny game is a great embedded exercise.
Smart Energy Meter Load Controller with LCD, Keypad and Relay Output
A practical look at a smart energy meter and load controller I built — live readings on an LCD, keypad input, a real relay, and the safety reminders that come with mains power.
AUST Mars Rover Electronics: PCB Design and Power Distribution Lessons
Lessons from the rover electronics side: circuit simulation, PCB planning, power distribution and the kind of integration work you only learn by doing it on a real team.
Pure Sinewave Inverter with Solar Charging for Backup Power
My thesis project as a real device: a pure-sinewave inverter with solar charging, aimed at the kind of hybrid rural power setups my work was about.
Automatic Power Factor Corrector: Real-Time Capacitor Bank Switching
Why I built an automatic power factor corrector with capacitor-bank switching, and what I learned about measurement, relay timing and AC safety on the way.
Flood Relief and Rescue Robot: A Robotics Idea for Bangladesh
A robotics project that started from something very real — Bangladesh floods — and turned into a remote-controlled platform for moving small relief payloads.
IoT Home Security with ESP Wi-Fi, Motion Sensor and Remote Alerts
A small but useful IoT home-security build with an ESP, motion + door sensors and remote alerts — and the reliability lessons that came with running it for real.
How to Make a Music Reactive Light
A simple LED strip project that reacts to bass from an audio signal and doubles as steady desktop lighting.
How to Make a Mini Speaker - Super Easy
A small rechargeable speaker build using a PAM8403 amplifier, salvaged speaker, phone battery, and simple enclosure.
How to Make an Adjustable Bench Power Supply From an Old PC PSU
A practical maker-style guide for converting a spare ATX computer power supply into a useful electronics bench supply.