1. Arduino Microcontroller Workshop UMBC Institute of Electrical and Electronics Engineers
Arduino UMBC IEEE
Sekar Kulandaivel
Week 3: Motor Control w/ H-Bridges
Technical Skills Series Presentation
April 15th – 16th, 2014

2. Topics to Cover
Diodes & Transistors External Voltage Sources MOSFETs and H-Bridges Motor Control (Speed & Direction)

3. Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET)
Gate
Source
Drain

4. Battery
Motor
Made with Fritzing.org

5. Using Transistors Create constants and variables.
Set inputs and outputs for setup() function.
Read from switch and write to transistor pin.

6. Important Functions
int val, time; void setup() { … } void loop() { … } Serial.begin(9600); Serial.print(“Hello”); Serial.println(“Hi”); delay(1000);
pinMode(8, INPUT);
pinMode(9, OUTPUT);
val = digitalRead(8);
digitalWrite(9, out);
val = analogRead(A0);
analogWrite(9, out);
time = millis();
map(var, testLow, testHigh, mapLow, mapHigh);

7. Motor Driver (H-Bridge)
Enable 1,2
VCC1
Input 1
Input 3
Output 1
Output 3
GND
GND
GND
GND
Output 2
Output 4
Input 4
Input 2
VCC2
Enable 3,4

8. Input 1
Input 2 M
Vin
Output 1
Output 2
Design from Wikipedia

9. Input 1
Input 2 M
Vin
Output 1
Output 2
Design from Wikipedia

10. Input 1
Input 2 M
Vin
Output 1
Output 2
Design from Wikipedia

11. Battery
Motor
Made with Fritzing.org

12. Using H-Bridges Create constants and variables.
Set inputs and outputs for setup() function.
Read from on-off and direction switch.
Changing the direction.
Going in one direction
Going in other direction.
Enabling the H-bridge.
Start or stop.

13. Important Functions
int val, time; void setup() { … } void loop() { … } Serial.begin(9600); Serial.print(“Hello”); Serial.println(“Hi”); delay(1000);
pinMode(8, INPUT);
pinMode(9, OUTPUT);
val = digitalRead(8);
digitalWrite(9, out);
val = analogRead(A0);
analogWrite(9, out);
time = millis();
map(var, testLow, testHigh, mapLow, mapHigh);

14. Color 1st Digit 2nd Digit Multiplier
4th band is Tolerance. L R
Color
1st Digit
2nd Digit
Multiplier
Black
100
Brown 1
101
Red 2
102
Orange 3
103
Yellow 4
104
Green 5
105
Blue 6
106
Violet 7
107
Gray 8
108
White 9
109

15. 330Ω 3
x =
10kΩ 1
x =
2kΩ 2
x =
1MΩ 1
x =