DC motor control & MQTT telemetry
SCADA-style system with PID speed control, current and voltage measurement via INA228, wireless MQTT telemetry over ESP32, and a desktop GUI — built on STM32 with FreeRTOS.
Digital Filters Explained
FIR and IIR filters from first principles — how they work, how they differ, and how they perform on real sensor data from an ADXL345 accelerometer.
FFT Explained
How the Fast Fourier Transform works — frequency resolution, aliasing, noise, and real sensor data from an ADXL345 accelerometer.
Spectral Leakage & Windowing
Why spectral leakage appears in FFT output and how window functions — Hann, flat top, rectangular — eliminate it.
SMT Line Simulation #1 — Soldering Process
Introduction to PCB soldering methods, common SMT defects, and the reflow thermal profile — written as background for a PLC-based SMT line simulation.
SMT Line Simulation #2 — Project Description
A full SMT assembly line simulation — reflow oven with PID control and thermal model, quality inspection, 2-axis pick-and-place manipulator, fault scenarios, and HMI with real-time visualization.
PID Controller
How a PID controller is built, how its parameters affect system response, and how to implement anti-windup clamping — with real DC motor experiments on STM32.
Tracker
Adaptive filtering system for real-time vibration analysis. MEMS sensor fusion, STM32-based DSP pipeline with configurable FIR/IIR stages.