SG90 Arduino Servo Sweep

Drive a 9 g micro servo from 0 to 180 degrees with a single PWM pin — the same hobby servo behind every RC car steering arm and entry-level robot joint.

Difficulty: Breadboard. Estimated build time: about 20 minutes. Estimated parts cost: about US$3.20. 6-part bill of materials with live supplier pricing. A microcontroller-driven hobby servo that smoothly sweeps its horn from 0 to 180 degrees and back.