Intermediate Arduino
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These are some ideas for an Intermediate Arduino class.
Basically, this is finishing up using all of the components that are included in the Arduino Beginner Kit from DF Robot.
Contents
Summary
Requirements
- Completed Introduction to Arduino.
- Completed Introduction to programming using Arduino
- Arduino starter kit
- Computer
- Arduino development environment
Overview Run Time: 2 Hours
- Relay
- Tilt Switch Sensor
- IR Remote Control
- Ultrasonic Sensor (no longer included in kit)
Relay
You'll need the following items:
- Relay
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal.
Tilt Switch
This is taken directly from DF Robot's website.
You'll need the following items:
- Tilt Switch
- Breadboard
Explanation
int light=8;//Connect the led to Digital Pin 8
void setup()
{
pinMode(light,OUTPUT);//C
}
void loop()
{
int i;
while(1)
{
i=analogRead(5);//Read Analog Pin 5 which connect to Tilt Sensor
if(i>200)// if reading is over 200（1V） (When you tilt the tilt sensor)
{
digitalWrite(light,HIGH);//Turn on led
}
else
{
digitalWrite(light,LOW);//Turn off led
}
}
}
IR Remote Control
- http://www.dfrobot.com/wiki/index.php?title=IR_Kit(SKU:DFR0107)
- http://www.dfrobot.com/wiki/index.php?title=IR_Remote_Control_Lesson
- Another version: http://www.instructables.com/id/Arduino-Infrared-Remote-tutorial/
IR is widely used in remoter control. With this IR receiver, the Arduino project is able to receive command from any IR remoter controller if you have the right decoder. Well, it will be also easy to make your own IR controller using IR transmitter.
You'll need the following items:
- IR Remote Control
- IR Receiver
/*
Infrared controlled Light
*/
#include <IRremote.h>
int RECV_PIN = 11;
int ledPin = 10;
boolean ledState = LOW;
IRrecv irrecv(RECV_PIN);
decode_results results;
void setup(){
Serial.begin(9600);
irrecv.enableIRIn();
pinMode(ledPin,OUTPUT);
}
void loop() {
if (irrecv.decode(&results)) {
Serial.println(results.value, HEX);
if(results.value == 0xFD00FF){
ledState = !ledState;
digitalWrite(ledPin,ledState);
}
irrecv.resume();
}
}
- Using all of the keys: IR Remote Control Complex Example
Ultrasonic Sensor
What you need:
- Breadboard
- Ultrasonic sensor
Open the following example: Arduino > Examples > Sensors > PING
// this constant won't change. It's the pin number
// of the sensor's output:
const int pingPin = 7;
void setup() {
// initialize serial communication:
Serial.begin(9600);
}
void loop()
{
// establish variables for duration of the ping,
// and the distance result in inches and centimeters:
long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);
// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(pingPin, INPUT);
duration = pulseIn(pingPin, HIGH);
// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);
Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);
}
long microsecondsToInches(long microseconds)
{
// According to Parallax's datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second). This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
// See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
return microseconds / 74 / 2;
}
long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}
We'll need to modify slightly to the following since we have one pine to tx (send) and one pin to rx (receive):
/* spot the two changes */
// this constant won't change. It's the pin number
// of the sensor's output:
const int pingPin = 7; // transmission pin
const int pingRx = 8; //receiving pin
void setup() {
// initialize serial communication:
Serial.begin(9600);
pinMode(pingPin, OUTPUT);
pinMode(pingRx, INPUT);
}
void loop()
{
// establish variables for duration of the ping,
// and the distance result in inches and centimeters:
long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(5);
digitalWrite(pingPin, LOW);
// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
duration = pulseIn(pingRx, HIGH);
// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);
Serial.print(inches);
Serial.print("in, ");
Serial.print(cm);
Serial.print("cm");
Serial.println();
delay(100);
}
long microsecondsToInches(long microseconds)
{
// According to Parallax's datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second). This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
// See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
return microseconds / 74 / 2;
}
long microsecondsToCentimeters(long microseconds)
{
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;
}
Segment Display
Other Function Ideas
- Internet??? Anyway to get connected to the cloud?
Challenges
Simple Keyboard
