Servo - Direct to Arduino

This covers controlling a micro-servo directly connected to the Arduino.  I say directly connected as opposed to using a motor shield.

Wiring

In the case of a micro servo like the SG90 shown below, it takes 5V power.

• Brown: Ground
• Red: 5V
• Orange: Digital Pin

Code

The example script to refrence is:  Examples > Servo > Sweep

• attach(digital pin #)
• write(pos)  //values 1-180 are treated as degrees
• writeMicroseconds(#) // values 700-2400  (fine control)

Note: if you set the the position too close to the minimum (i.e. 0 degrees or below 700us), the servo will do a full spin to the other 180.

Note2:  duty cycle is 20ms, so it's no benefit to command it any faster than that.