#diypianoarduino
Text
DIY PIANO (Creación de una interfase basada en la librería CapacitiveSensor)
Con este sketch crearemos un teclado realizado con papel, lapiz, y clips. Usaremos la librería CapacitiveSensor para crear sensibilidad a la capacitancia del cuerpo humano en los pines digitales.
Componentes
Arduino Uno
Protoboard
7 resistencias 1 Mega ohm
7 clips
1 hoja papel
lápiz
Circuito
Código
/* DIY Piano
- DIY Piano with Arduino. This is a very simple project.
- ONLY needed some very cheap materials,
e.g. pencil, A4 paper, paper clip, speaker, male-to-male jumper, breadboard and Arduino Uno board.
- Of course the Arduino Uno board is not cheap, but it is reusable for other projects too. So it is worth to own one.
- This project using the concept of capasitive sensor, so no switch/button is required for it.
- Here is the link of capacitive sensor. For better understanding, please visit the page.
http://playground.arduino.cc//Main/CapacitiveSensor?from=Main.CapSense
- To watch the Demo of This Project:
http://www.youtube.com/watch?v=X4QNT5hOHLs&list=TLlm-tAV1gEzDF4VV39VdjCSLNlfe0tTpU
Created by:
Oh Hai Seng || Junny Oh 07 November 2013
*/
// Import the CapacitiveSensor Library.
#include <CapacitiveSensor.h>
// Name the pin as led.
#define speaker 11
// Set the Send Pin & Receive Pin.
CapacitiveSensor cs_2_3 = CapacitiveSensor(2,3); /* 10M resistor between pins 4 & 2, pin 2 is sensor pin, add a wire and or foil if desired*/
CapacitiveSensor cs_2_4 = CapacitiveSensor(2,4); /* 10M resistor between pins 4 & 6, pin 6 is sensor pin, add a wire and or foil*/
CapacitiveSensor cs_2_5 = CapacitiveSensor(2,5); /* 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil*/
CapacitiveSensor cs_2_6 = CapacitiveSensor(2,6); /* 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil*/
CapacitiveSensor cs_2_7 = CapacitiveSensor(2,7); /* 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil*/
CapacitiveSensor cs_2_8 = CapacitiveSensor(2,8); /* 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil*/
CapacitiveSensor cs_2_9 = CapacitiveSensor(2,9); /* 10M resistor between pins 4 & 8, pin 8 is sensor pin, add a wire and or foil*/
void setup()
{
cs_2_3.set_CS_AutocaL_Millis(0xFFFFFFFF); // turn off autocalibrate on channel 1 - just as an example
// Arduino start communicate with computer.
Serial.begin(9600);
}
void loop()
{
// Set a timer.
long start = millis();
// Set the sensitivity of the sensors.
long total1 = cs_2_3.capacitiveSensor(30);
long total2 = cs_2_4.capacitiveSensor(30);
long total3 = cs_2_5.capacitiveSensor(30);
long total4 = cs_2_6.capacitiveSensor(30);
long total5 = cs_2_7.capacitiveSensor(30);
long total6 = cs_2_8.capacitiveSensor(30);
long total7 = cs_2_9.capacitiveSensor(30);
Serial.print(millis() - start); // check on performance in milliseconds
Serial.print("\t"); // tab character for debug windown spacing
Serial.print(total1); // print sensor output 1
Serial.print("\t"); // Leave some space before print the next output
Serial.print(total2); // print sensor output 2
Serial.print("\t"); // Leave some space before print the next output
Serial.print(total3); // print sensor output 3
Serial.print("\t"); // Leave some space before print the next output
Serial.print(total4); // print sensor output 4
Serial.print("\t"); // Leave some space before print the next output
Serial.print(total5); // print sensor output 5
Serial.print("\t"); // Leave some space before print the next output
Serial.print(total6); // print sensor output 6
Serial.print("\t"); // Leave some space before print the next output
Serial.println(total7); // print sensor output 7
// "println" - "ln" represent as "line", system will jump to next line after print the output.
// When hand is touched the sensor, the speaker will produce a tone.
// I set a threshold for it, so that the sensor won't be too sensitive.
if (total1 > 150) tone(speaker,523);
if (total2 > 150) tone(speaker,587);
if (total3 > 150) tone(speaker,659);
if (total4 > 150) tone(speaker,698);
if (total5 > 150) tone(speaker,783);
if (total6 > 150) tone(speaker,880);
if (total7 > 150) tone(speaker,988);
// When hand didn't touch on it, no tone is produced.
if (total1<=150 & total2<=150 & total3<=150 & total4<=150 & total5<=150 & total6<=150 & total7<=150)
noTone(speaker);
delay(10); // arbitrary delay to limit data to serial port
}
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