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Connect a Servo Motor


This How-to is intended for: Any audience.

Connect and use a servo motor with the Make Controller Kit.

Problem

You want to connect a standard servo motor to the Make Controller Kit.

 

Standard Servo
A servo motor.

 

Solution

Plug a servo with a standard 3-spot servo connector into one of the 4 available servo controllers on the Application Board.  Be sure to get the orientation correct - servos usually come with 3 wires on them.  The black is usually ground, the red is usually 5V, and the yellow or white is the signal.  Check the servo section of the Application Board Overview

for more info. 

 

appboard_servos.png

 

The reference for controlling servos via OSC can be found here, and the reference for programming servos in your own firmware is here.

 

Discussion

Servo motors are great for specifically positioned movement within a 180 degree range. The connectors on the Application Board are 0.1" spaced headers that are compatible with the standard Hitec and Futaba servo connectors.
 

You can draw about 90 mA through the USB connection, which is enough to drive one servo with little to no load.  You can draw up to 1A of current from the 5V line on the board if you have a power supply connected to the main power connector.  If you need even more current for your servos, provide your own supply (usually 5V or 6V for servos) and connect it to the 2-spot VExtS (external servo voltage) connector and switch the external power select jumper shown in the image above.  Again, check the Application Board Overview for more info.