The loop is powered by a single SG90 micro servo and an ESP32-S3 board. Instead of a bulky elevator, a piece of 1mm wire is used as the lifting arm to reset the ball's position. Simple, lightweight, and very cool to watch.
Technical Specifications
- Brain: ESP32-S3 (easily adaptable to any microcontroller).
- Actuator: 1x SG90 micro servo.
- Mechanism: DIY 1mm wire lifting arm.
- Goal: a simple, yet incredibly satisfying continuous loop.
Assembly Tip
The lift arm is made from a short piece of 1mm stiff wire (like a paperclip or floral wire). You'll need to bend it slightly to match the servo's horn and the track height for the perfect "hand-off" of the ball.
Fun fact: this is a great way to use up leftover scraps of filament and spare servos lying around. It's small enough to sit right under your monitor.