Smarthon Servo SG90 160° and 360°

The SG90 designed duty cycle (pulse length) is 500µs to 2500µs, during this range, the duty cycle will be representing different meaning.

For 180° Servo, the duty cycle will represent to the position

Duty cycle(us) Degree

500 0°

833 30°

1166 60°

1500 90°

1832 120°

2165 150°

2500 180°

For 360° Servo, the duty cycle range is different, and the meaning represents direction and speed

Duty cycle(us) Direction Speed

1000 clockwise 100%

1166 clockwise 60%

1333 clockwise 30%

1500 N/A stop

1666 anti-clockwise 30%

1832 anti-clockwise 60%

2000 anti-clockwise 100%

Determine the type of servo (180°/360°)

Look at the side that has cable pull out, checking whether there is a variable resistor or not.

If have a “green variable resistor”, that is 180° servo.

Otherwise, that is 360°

Pinout Diagram:

Pin    Function

G       Ground

V       Voltage Supply

S        Input (PWM signal with duty cycle)