Based on the Arduino-Servo-Example, Max can be used to send control data via USB.
Connecting the servo motor to the Arduino requires no additional parts, except for jumper cables. It is directly powered from the Arduino's 5V pin (larger servos may require an additional power source) and receives data from the Pulse-With-Modulation pin ~9:
First, find the Arduino's serial port ID by clicking
serial object (in this case 'd' for 'usbmodem').
The rotary knob can be used to manually set the angle - it needs to be scaled from 0 to 180 before.
Finally, the metro can be started with the toggle. It sets random values at randomized time intervals.
Extend the servo example with additional hardware and programming to a miniature sound installation.