Zieh ab, wenn’s leuchtet!” (Light Barrier Game)

This is a small Arduino-based reaction game enclosure for the project
“Zieh ab, wenn’s leuchtet!”.

The game uses an optical fork sensor (light barrier) to measure reaction time with millisecond precision.
LEDs and a piezo buzzer provide visual and acoustic feedback, while an optional I2C OLED display shows the measured reaction time.

The enclosure is designed for breadboard-based prototyping, making it ideal for:

learning Arduino basics

workshops and maker projects

demonstrating interrupts, timing and digital I/O in a playful way

👉 Full build guide, wiring, and code:
https://draeger-it.blog/zieh-ab-wenns-leuchtet-mini-reaktionsspiel-mit-arduino/