En esta practica hemos utilizado una placa arduino, una placa board, 4 pulsadores, 2 resistencias de 10 kilo ohmios, una de 1 m ohmios y otra de 220 ohmios. También un altavoz y varios cables.
Esta practica consiste en tocar los distintos pulsadores y cada vez que tocabas cada uno de los distintos pulsadores el sonido que producía el altavoz iba cambiando
El programa es el siguiente
/*
Arduino Starter Kit example
Project 7 - Keyboard
This sketch is written to accompany Project 7 in the
Arduino Starter Kit
Parts required:
two 10 kilohm resistors
1 Megohm resistor
220 ohm resistor
4 pushbuttons
piezo
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// create an array of notes
// the numbers below correspond to
// the frequencies of middle C, D, E, and F
int notes[] = {262, 294, 330, 349};
void setup() {
//start serial communication
Serial.begin(9600);
}
void loop() {
// create a local variable to hold the input on pin A0
int keyVal = analogRead(A0);
// send the value from A0 to the Serial Monitor
Serial.println(keyVal);
// play the note corresponding to each value on A0
if(keyVal == 1023){
// play the first frequency in the array on pin 8
tone(8, notes[0]);
}
else if(keyVal >= 990 && keyVal <= 1010){
// play the second frequency in the array on pin 8
tone(8, notes[1]);
}
else if(keyVal >= 505 && keyVal <= 515){
// play the third frequency in the array on pin 8
tone(8, notes[2]);
}
else if(keyVal >= 5 && keyVal <= 10){
// play the fourth frequency in the array on pin 8
tone(8, notes[3]);
}
else{
// if the value is out of range, play no tone
noTone(100);
}
}
En este proyecto hemos utilizado 3 LDR, 6 resistencias, tres de 220 ohmios y otras tres de 10k. Además hemos empleado un elemento nuevo, un led de 4 patas, y de varios colores.
Con esto hemos conseguido que al tapar las distinatas LDR, de forma aleatoria, el led cambiaba de color, como se ve en el siguiente vídeo:
PROGRAMA:
/*
Arduino Starter Kit example
Project 4 - Color Mixing Lamp
This sketch is written to accompany Project 3 in the
Arduino Starter Kit
Parts required:
1 RGB LED
three 10 kilohm resistors
3 220 ohm resistors
3 photoresistors
red green and blue colored gels
Created 13 September 2012
Modified 14 November 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://arduino.cc/starterKit
This example code is part of the public domain
*/
const int greenLEDPin = 9; // LED connected to digital pin 9
const int redLEDPin = 10; // LED connected to digital pin 10
const int blueLEDPin = 11; // LED connected to digital pin 11
const int redSensorPin = A0; // pin with the photoresistor with the red gel
const int greenSensorPin = A1; // pin with the photoresistor with the green gel
const int blueSensorPin = A2; // pin with the photoresistor with the blue gel
int redValue = 0; // value to write to the red LED
int greenValue = 0; // value to write to the green LED
int blueValue = 0; // value to write to the blue LED
int redSensorValue = 0; // variable to hold the value from the red sensor
int greenSensorValue = 0; // variable to hold the value from the green sensor
int blueSensorValue = 0; // variable to hold the value from the blue sensor
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
// set the digital pins as outputs
pinMode(greenLEDPin,OUTPUT);
pinMode(redLEDPin,OUTPUT);
pinMode(blueLEDPin,OUTPUT);
}
void loop() {
// Read the sensors first:
// read the value from the red-filtered photoresistor:
redSensorValue = analogRead(redSensorPin);
// give the ADC a moment to settle
delay(5);
// read the value from the green-filtered photoresistor:
greenSensorValue = analogRead(greenSensorPin);
// give the ADC a moment to settle
delay(5);
// read the value from the blue-filtered photoresistor:
blueSensorValue = analogRead(blueSensorPin);
// print out the values to the serial monitor
Serial.print("raw sensor Values \t red: ");
Serial.print(redSensorValue);
Serial.print("\t green: ");
Serial.print(greenSensorValue);
Serial.print("\t Blue: ");
Serial.println(blueSensorValue);
/*
In order to use the values from the sensor for the LED,
you need to do some math. The ADC provides a 10-bit number,
but analogWrite() uses 8 bits. You'll want to divide your
sensor readings by 4 to keep them in range of the output.
*/
redValue = redSensorValue/4;
greenValue = greenSensorValue/4;
blueValue = blueSensorValue/4;
/*
Now that you have a usable value, it's time to PWM the LED.
*/
analogWrite(redLEDPin, redValue);
analogWrite(greenLEDPin, greenValue);
analogWrite(blueLEDPin, blueValue);
}
En este proyecto hemos utilizado 3 resistencias de 220 ohmnios cada una, 3 diodos led, varios cables, placa arduino y placa board, y por último un elemento nuevo que no habíamos utilizado antes, un sensor que detecta la temperatura, en concreto los cambios de la misma. Con todo ello hemos conseguido que poner el dedo en el sensor, este detecta el calor humano y a medida que la temperatura va aumentando, se van encendiendo los diferentes led (en función a los valores que hemos fijado). A medida que la temperatura aumentaba, también lo hacía el número de leds encendidos, como se muestra en el siguiente vídeo.
/*
Arduino Starter Kit example
Project 3 - Love-O-Meter
This sketch is written to accompany Project 3 in the
Arduino Starter Kit
Parts required:
1 TMP36 temperature sensor or LM35DZ
3 red LEDs
3 220 ohm resistors
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// named constant for the pin the sensor is connected to
const int sensorPin = A0;
// room temperature in Celcius
const float baselineTemp = 20.0;
void setup(){
// open a serial connection to display values
Serial.begin(9600);
// set the LED pins as outputs
// the for() loop saves some extra coding
for(int pinNumber = 2; pinNumber<5; pinNumber++){
pinMode(pinNumber,OUTPUT);
digitalWrite(pinNumber, LOW);
}
}
void loop(){
// read the value on AnalogIn pin 0
// and store it in a variable
int sensorVal = analogRead(sensorPin);
// send the 10-bit sensor value out the serial port
Serial.print("sensor Value: ");
Serial.print(sensorVal);
// convert the ADC reading to voltage
float voltage = (sensorVal/1024.0) * 5.0;
// Send the voltage level out the Serial port
Serial.print(", Volts: ");
Serial.print(voltage);
// convert the voltage to temperature in degrees C
// the sensor changes 10 mV per degree
// the datasheet says there's a 500 mV offset
// ((volatge - 500mV) times 100) for tmp36
// ((volatge) times 100) for LM35DZ
Serial.print(", degrees C: ");
float temperature = (voltage) * 100;
Serial.println(temperature);
// if the current temperature is lower than the baseline
// turn off all LEDs
if(temperature < baselineTemp){
digitalWrite(2, LOW);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 2-4 degrees, turn an LED on
else if(temperature >= baselineTemp+2 && temperature < baselineTemp+4){
digitalWrite(2, HIGH);
digitalWrite(3, LOW);
digitalWrite(4, LOW);
} // if the temperature rises 4-6 degrees, turn a second LED on
else if(temperature >= baselineTemp+4 && temperature < baselineTemp+6){
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, LOW);
} // if the temperature rises more than 6 degrees, turn all LEDs on
En esta práctica hemos investigado en el programa y cambiando la función delay, que se encuentra al final, hemos conseguido que cambie la tonalidad del altavoz. De tal forma que si lo ponemos a 1 el sonido es muy grave y seguido, y cuando lo pusimos a 1000 el tono era más agudo y más intermitente.
En esta práctica hemos utilizado además de los materiales habituales como cables o placa arduino y placa board, hemos usado un altavoz, una LDR, y una resistencia de 10 kOhmios.
Con ello hemos conseguido que al poner la mano encima de la LDR, esta detecta sombra y cambia el sonido como se muestra en el siguiente video.
El programa es el siguiente:
/*
Arduino Starter Kit example
Project 6 - Light Theremin
This sketch is written to accompany Project 6 in the
Arduino Starter Kit
Parts required:
photoresistor
10 kilohm resistor
piezo
Created 13 September 2012
by Scott Fitzgerald
http://arduino.cc/starterKit
This example code is part of the public domain
*/
// variable to hold sensor value
int sensorValue;
// variable to calibrate low value
int sensorLow = 1023;
// variable to calibrate high value
int sensorHigh = 0;
// LED pin
const int ledPin = 13;
void setup() {
// Make the LED pin an output and turn it on
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, HIGH);
// calibrate for the first five seconds after program runs
while (millis() < 5000) {
// record the maximum sensor value
sensorValue = analogRead(A0);
if (sensorValue > sensorHigh) {
sensorHigh = sensorValue;
}
// record the minimum sensor value
if (sensorValue < sensorLow) {
sensorLow = sensorValue;
}
}
// turn the LED off, signaling the end of the calibration period
digitalWrite(ledPin, LOW);
}
void loop() {
//read the input from A0 and store it in a variable
sensorValue = analogRead(A0);
// map the sensor values to a wide range of pitches
int pitch = map(sensorValue, sensorLow, sensorHigh, 50, 4000);
// play the tone for 20 ms on pin 8
tone(8, pitch, 20);
// wait for a moment
delay(10);
}
