buzzer - Ogbugbu Technologies

ESP32 Touch Pin Piano: Play Music with Bare Wires (Capacitive Touch)

November 5, 2026November 12, 2026 - by Ogbugbu Technologies - Leave a Comment

The ESP32 hides a magic trick: ten of its GPIOs have built-in capacitive touch sensing, meaning a bare wire end becomes a touch button with zero extra components. In this …

Arduino Projects

Arduino HC-SR04 Ultrasonic Distance Meter with Buzzer Alarm (Parking Sensor Project)

November 2, 2026November 12, 2026 - by Ogbugbu Technologies - Leave a Comment

The HC-SR04 ultrasonic sensor measures distance by bouncing sound waves off objects, exactly like a bat. In this project you’ll combine it with a piezo buzzer and an LED to …