This tabletop clock is built using 3D-printed parts and powered by an Arduino Uno, three 12V stepper motors and a DS3231 RTC module for accurate real-time date and time updates. This 3D-printed ...

I recommended you to check out this Arduino Multitaking tutorial for an in-depth explanation. /* ===== Pin Definitions ===== */ // Ultrasonic Sensor Pins #define vccPin 4 // Ultrasonic sensor VCC pin ...