Drive a servo motor

Goal

Sweep a servo from 0° to 180° and back.

Why it matters

The servo reads pulse width (1 to 2 ms): that is position modulation.

Steps

1. 01Add a servo motor on pin 9.
2. 02Sweep the angle from 0 to 180 with a for loop.
3. 03Leave 15 ms between each degree so the arm can follow.
4. 04Do the return trip.

Next tutorials

• PWM: dimming an LED

  Breathe an LED from 0 to 255 with analogWrite().

• Potentiometer → brightness

  Set LED brightness with the knob (10 bits to 8 bits).

• RGB LED: mixing colours

  Create any colour with three PWM channels.

• Smooth fade (sine curve)

  Make the fade look linear by using a non-linear curve.