3 · Outputs & actuators
Potentiometer → brightness
Intermediate15 min
Goal
Set LED brightness with the knob (10 bits to 8 bits).
Why it matters
map() is the universal tool for linking two different scales.
Steps
- 01Read A0 (0–1023).
- 02Convert with map(value, 0, 1023, 0, 255).
- 03Send the result to analogWrite() on pin 9.
This tutorial runs inside the Circuitly simulator: your wiring and your code are checked automatically at every step.