Physical Output

Physical Output

Make things move by controlling motors with Arduino
Servo-motors
Rotary actuator that

Brushed DC Motors

Simple devices with two leads connected to brushes (contacts)
Control

Brushless Motors

More powerful and efficient for a given size
Three phases of

DC Motor Parameters

Direct-drive vs. gearhead – built-in gears or not
Voltage –

DC Motor Characteristics

When the first start up, they draw a lot

Driving DC Motor

To drive them, apply a voltage
The higher the voltage,

Switching Motors with Transistors

Transistors switch big signals with little signals
Since motors

Driving a Brushed Motor

const int motorPin = 3;
const int switchPin =

Controlling Speed of DC-Motor

const int motorPin = 3;
const int potPin =

Servo-Motors

Allow accurately control physical movement
Move to a position instead of continuously

Servo-Motors

Servo-Motors

Respond to changes in the duration of a pulse
Short pulse of

Servo-Motors

Come in all sizes
from super-tiny
to drive-your-car
All have same 3-wire interface
Servos are

Servo Control

PWM freq is 50 Hz (i.e. every 20 millisecs)
Pulse width

Servo and Arduino

const int servoPin = 7;
const int potPin = A0;
const

Use the Servo library

servo.attach(pin[, min][, max]) – attach the servo
pin- the

Servo sweeper

#include
Servo myservo; // create servo object to control a

Controlling angle with pot

#include
Servo myservo; // create servo object to

Stepper Motors

Rotate a specific number of degrees in response to control

Stepper Motors

Unipolar drivers always energize the phases in the same way
Single

Stepper Motors

All of the common coil wires are tied together internally

Driving a Unipolar Stepper Motor

const int stepperPins[4] = {2, 3, 4,

Driving a Bipolar Stepper Motor

const int stepperPins[4] = {2, 3, 4,

Arduino Stepper Library

Allows to control unipolar or bipolar stepper motors
stepper(steps, pin1,