A personal learning journal — from zero electronics knowledge to embedded systems, one session at a time.
- Hardware: ESP32 DevKit V1 + Elegoo starter kit components, including:
- LEDs, resistors, and push buttons
- Sensors: DHT11 (temperature & humidity), photoresistor (light sensor), ultrasonic sensor (HC-SR04), potentiometer
- Motors / Actuators: DC motors with motor driver, servo motors
- Buzzer, LCD display, jumper wires, breadboard
- Software: Arduino IDE / C++
- Circuits schematics are made with Circuit Diagram: see my profile
| # | Date | Topics |
|---|---|---|
| 01 | 2026-04-05 | Ohm's Law, resistors, LEDs, RGB LED, breadboard basics, flashing ESP32 |
| 02 | 2026-04-06 | Push buttons, pull-up resistors, floating pin, debouncing, falling edge, PWM |
| 03 | 2026-04-19 | Active vs passive buzzer, frequencies, note durations, melody encoding |
| 04 | 2026-05-06 | DC motor, L293D H-bridge, IR remote, NEC protocol, hardware interrupts, PWM |
Each session folder contains a README cheat sheet, source code, and reference images.