Arduino servo that follows a knob
Open in the lab ▸Make my own copy
Turn the potentiometer and the servo turns with it. analogRead gives 0 to 1023, map() turns that into 0 to 180°, and the Servo library makes the pulse the servo wants (1 to 2 ms, 50 times a second). The same pattern steers a robot arm joint or a camera mount. Drag the knob. Open it and press Run: the sketch is inside the board (click the board, then Code). Every part, pin and resistor matches what you would build on a real breadboard; the guided build of the same name has the test sheet and hidden faults.
What is on the bench
4 parts, 7 wires, with a sketch (the program runs in the lab). Boards: Arduino Uno R3.
| Arduino Uno R3 | 1 |
|---|---|
| USB charger / port | 1 |
| Potentiometer | 1 |
| Hobby servo | 1 |
Put it on your page
The project runs live inside the frame: readers can press buttons, turn knobs and read the meters.
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Link
https://zencircuitlab.com/p/zclcknob
Published by its author under the lab's community terms: it may be opened, copied and changed by anyone. Simulation results are for learning; check a real build against the parts' datasheets.