Make: Robotic Arms

17Chapter 1: The Foundation of Robotic Arms

MAKING OUR FIRST MOTOR MOVE

We have our first Arduino sketch under our belt,

and now that we have that taken care of, it’s time to

write some code specifically for the circuit we built.

Look back at our first circuit: We have three wires,

each plugged into one of the three connectors on

our servo motor. The red wire is our positive voltage,

plugged into the 5 V pin; the brown wire is our ground

connection, plugged into one of our GND pins; and

our yellow wire, our signal wire, is plugged into

digital pin 3. Thankfully, we don’t need to do any

programming for our red and brown wires, because

all they ...