Tower Pro SG90 9G Micro Servo


sg90 s

RC Servo is a type of geared motor that can rotate 90 or 180 degrees. It is great for beginners who want to make stuff move without building a motor controller with feedback and a gearbox. Originally used in remote-controlled cars and airplanes. It is controlled by sending a PWM signal from the microcontroller. The PWM signal tells the servo what position it should move to.


Most standard RC servos use a standard type of 3-pin plus. The connector is a female, 3-pin, 0.1" (2.54 mm) pitch header. The wiring color used on the servo is not always consistent. There are several color codes at play. But the pins are usually in the same order, and just the colors are different.

  • OrangeYellow, white, or blue wire — Servo control signal line (PWM signal)
  • Red wire — Servo power (Vservo, battery positive terminal)
  • Brown or Black wire — Ground (GND, battery negative terminal)


SG90 servo can rotate approximately 180 degrees (90 in each direction). 

Wired Connection

sg90 wires s


Position "0" degree ( 0.5 ms Pulse) is all the way to the left, "90" degree (1.5ms pulse) in the middle, "180" degree (2.4ms pulse) is all the way to the right.