1. Topics: Analog/Digital Read Relay control 7 segment control Buzzer
Arduino Part 2
Topics:
Analog/Digital Read
Relay control
7 segment control
Buzzer

2. Workshop Overview Hands-on Project 4: Reading analog signal
Hands-on Project 5: Reading digital signal
Hands-on Project 6: melody with buzzer
Hands-on Project 7: LED Dimmer
Hands-on Project 8: Relay control
Hands-on Project 9: 7-segment control

3. Hands-on Project 4: Reading analog signal1 2
hardware setup:
Write the code/sketch:
void setup() {
Serial.begin(9600); }
void loop() {
int sensorValue = analogRead(A0);
Serial.println(sensorValue);
delay(1000);
Trimmer potentiometer

4. Hands-on Project 4: Reading analog signal3 4
Load the program into arduino
Open serial monitor, turn the potentiomenter and observe the output
Press verify button to check for errors
Press upload button to load the program into the arduino
Serial monitor
Try to use other sensors/input that produce analog signal and observe the output

5. Hands-on Project 5: Reading digital signal2 1
Write the code/sketch:
hardware setup:
int pushButton = 2;
void setup() {
Serial.begin(9600);
pinMode(pushButton, INPUT); }
void loop() {
int buttonState = digitalRead(pushButton);
Serial.println(buttonState);
delay(1);
10kOhm

6. Hands-on Project 5: Reading digital signal3 4
Load the program into arduino
Open serial monitor, press the button and observe the output
Press verify button to check for errors
Press upload button to load the program into the arduino
Serial monitor
Try to use other sensors/input that produce digital signal and observe the output

7. Hands-on Project 6: melody with buzzer1 2
The code/sketch:
hardware setup:

8. Hands-on Project 6: melody with buzzer3 4
Once uploaded, you should be able to hear the melody
Load the program into arduino
Press verify button to check for errors
Press upload button to load the program into the arduino
Try to change the tone variable and observe the output

9. Hands-on Project 7: LED Dimmer1 2
The code/sketch:
hardware setup:
220 Ohm

10. Hands-on Project 7: LED Dimmer3 4
Once uploaded, you should be able to see the brightness of your LED changes
Load the program into arduino
Press verify button to check for errors
Press upload button to load the program into the arduino

11. Hands-on Project 8: relay control1
hardware setup (use relay module from SIRIM robokit):
relay2
relay1
relay4
relay3
GND 5v

12. Hands-on Project 8: relay control2
The Code:
void setup() {
Serial.begin(9600);
pinMode(12, OUTPUT); }
void loop() {
if (Serial.available() > 0) {
int inByte = Serial.read();
switch (inByte) {
case 'a':
digitalWrite(12, HIGH);
break;
case 'b':
digitalWrite(12, LOW);
Copy from previous example (project3)
use pin/port number 12 3
Verify and upload the program 4
Press ‘a’ or ‘b’ to activate the relay

13. Hands-on Project 9: 7-segment control1
hardware setup (use 7segment module from SIRIM robokit): 5v
GND
Bit 1
Bit 0
Bit 3
Bit 2
display4
display3
display2
display1

14. Hands-on Project 9: 7-segment control2
The Code:
bit3
bit2
bit1
bit0
display 1 2 3 4 5 6 7 8 9
we will use display number 4 only
the number will be displayed based on the following table: 5v
GND
Bit 1
Bit 0
Bit 3
Bit 2

15. Hands-on Project 9: 7-segment control2
The Code(cont.):
int b0 = 2;
int b1 = 3;
int b2 = 4;
int b3 = 5;
int b4 = 6;
void setup() {
pinMode(b0, OUTPUT);
pinMode(b1, OUTPUT);
pinMode(b2, OUTPUT);
pinMode(b3, OUTPUT);
pinMode(b4, OUTPUT); }
void loop() {
digitalWrite(b0, HIGH);
digitalWrite(b1, LOW);
digitalWrite(b2, LOW);
digitalWrite(b3, LOW);
digitalWrite(b4, HIGH); } 5v
GND
Bit 1
Bit 0
Bit 3
Bit 2
This code will always display number 1.
Try to change the number by changing the logic level of b0,b1,b2 and b3 according to the previous table

16. Hands-on Project 9: 7-segment control3
The results:
void loop() {
digitalWrite(b0, HIGH);
digitalWrite(b1, LOW);
digitalWrite(b2, LOW);
digitalWrite(b3, LOW);
digitalWrite(b4, HIGH); }
void loop() {
digitalWrite(b0, LOW);
digitalWrite(b1, HIGH);
digitalWrite(b2, LOW);
digitalWrite(b3, LOW);
digitalWrite(b4, HIGH); }
void loop() {
digitalWrite(b0, HIGH);
digitalWrite(b1, HIGH);
digitalWrite(b2, LOW);
digitalWrite(b3, LOW);
digitalWrite(b4, HIGH); }

17. References www.arduino.cc www.ladyada.net/learn/arduino