From: Andrea Manni <andrea@piffa.net>
Date: Mon, 13 Apr 2015 16:31:59 +0000 (+0200)
Subject: light and sound
X-Git-Url: http://git.piffa.net/web?a=commitdiff_plain;h=ca9bc9014acdfae3ee07d19650c547f02b796994;p=sketchbook_andrea

light and sound
---

diff --git a/basic/analog_input/photo_3_serial/photo_3_serial.ino b/basic/analog_input/photo_3_serial/photo_3_serial.ino
index 2266237..3b0a96d 100644
--- a/basic/analog_input/photo_3_serial/photo_3_serial.ino
+++ b/basic/analog_input/photo_3_serial/photo_3_serial.ino
@@ -1,6 +1,6 @@
 /*
   Photoresistor
-  
+ 
  Utilizzare una fotoresistenza come analog input.
  Il comportamento della foto resistenza e' simile
  a un potenziometro: varia la resistenza in base alla 
@@ -11,6 +11,8 @@
  
  Questo sketch modifica l'intervallo di intermittenza di un led
  in base alla luminosita' rilevata.
+ 
+ Schema: http://lab.piffa.net/schemi/photoresistor_led.png
  */
 
 int sensorPin = A0;    // select the input pin for the potentiometer
@@ -20,7 +22,7 @@ int sensorValue = 0;  // variable to store the value coming from the sensor
 void setup() {
   // declare the ledPin as an OUTPUT:
   pinMode(ledPin, OUTPUT);  
-    // initialize serial communications at 9600 bps:
+  // initialize serial communications at 9600 bps:
   Serial.begin(9600); 
 }
 
@@ -34,7 +36,7 @@ void loop() {
   // turn the ledPin off:        
   digitalWrite(ledPin, LOW);   
   // stop the program for for <sensorValue> milliseconds:
-    // print the results to the serial monitor:
+  // print the results to the serial monitor:
   Serial.print("sensor = " );                       
   Serial.print(sensorValue);      
   Serial.print("\t delay = ");      
@@ -43,8 +45,9 @@ void loop() {
 }
 
 /* domande:
-1. qual'e' il valore minimo rilevato?
-2. quale il massimo?
-3. Come adattare la risoluzione dell'attuatore alla sensibilita' del sensore?
-*/
+ 1. qual'e' il valore minimo rilevato?
+ 2. quale il massimo?
+ 3. Come adattare la risoluzione dell'attuatore alla sensibilita' del sensore?
+ */
+
 
diff --git a/basic/analog_input/photo_4_calibrated/photo_4_calibrated.ino b/basic/analog_input/photo_4_calibrated/photo_4_calibrated.ino
index b432528..2708689 100644
--- a/basic/analog_input/photo_4_calibrated/photo_4_calibrated.ino
+++ b/basic/analog_input/photo_4_calibrated/photo_4_calibrated.ino
@@ -11,14 +11,16 @@
  
  Questo sketch modifica l'intervallo di intermittenza di un led
  in base alla luminosita' rilevata.
+ 
+ Schema: http://lab.piffa.net/schemi/photoresistor_led.png
  */
 
 int sensorPin = A0;    // select the input pin for the potentiometer
 int ledPin = 13;      // select the pin for the LED
 int sensorValue = 0;  // variable to store the value coming from the sensor
 
-int min = 240;        // valore minimo rilevato dal sensore
-int max = 380;        // valore massimo rilevato dal sensore
+int min = 60;        // valore minimo rilevato dal sensore
+int max = 600;        // valore massimo rilevato dal sensore
 
 void setup() {
   // declare the ledPin as an OUTPUT:
@@ -42,14 +44,16 @@ void loop() {
   // print the results to the serial monitor:
   Serial.print("sensor = " );                       
   Serial.print(sensorValue);      
-  Serial.print("\t delay = ");      
+  Serial.print("\t cal delay = ");      
   Serial.println(calValue);
   delay(sensorValue);                  
 }
 
-/* domande:
- 1. qual'e' il valore minimo rilevato?
- 2. quale il massimo?
- 3. Come adattare la risoluzione dell'attuatore alla sensibilita' del sensore?
- */
+/*
+Domande:
+1. Modificare lo sketch in modo che modifichi la luminosita' di un led 
+via PWM tramite il valore letto dal sensore.
+2. Come fare per costringere la variabile dentro un intervallo stabilito?
+3. Come si potrebbe eseguire la calibrazione automaticamente?
+*/
 
diff --git a/basic/analog_input/photo_5_calibration/photo_5_calibration.ino b/basic/analog_input/photo_5_calibration/photo_5_calibration.ino
new file mode 100644
index 0000000..db0d2b0
--- /dev/null
+++ b/basic/analog_input/photo_5_calibration/photo_5_calibration.ino
@@ -0,0 +1,80 @@
+/*
+  Calibration
+ 
+ Demonstrates one technique for calibrating sensor input.  The
+ sensor readings during the first five seconds of the sketch
+ execution define the minimum and maximum of expected values
+ attached to the sensor pin.
+ 
+ The sensor minimum and maximum initial values may seem backwards.
+ Initially, you set the minimum high and listen for anything 
+ lower, saving it as the new minimum. Likewise, you set the
+ maximum low and listen for anything higher as the new maximum.
+ 
+ The circuit:
+ * Analog sensor (potentiometer will do) attached to analog input 0
+ * LED attached from digital pin 9 to ground
+ 
+ created 29 Oct 2008
+ By David A Mellis
+ modified 30 Aug 2011
+ By Tom Igoe
+ 
+ http://arduino.cc/en/Tutorial/Calibration
+ 
+ This example code is in the public domain.
+ 
+ */
+
+// These constants won't change:
+const int sensorPin = A0;    // pin that the sensor is attached to
+const int ledPin = 9;        // pin that the LED is attached to
+
+// variables:
+int sensorValue = 0;         // the sensor value
+int sensorMin = 1023;        // minimum sensor value
+int sensorMax = 0;           // maximum sensor value
+
+
+void setup() {
+  // turn on LED to signal the start of the calibration period:
+  pinMode(13, OUTPUT);
+  digitalWrite(13, HIGH);
+
+  // calibrate during the first five seconds 
+  while (millis() < 5000) {
+    sensorValue = analogRead(sensorPin);
+
+    // record the maximum sensor value
+    if (sensorValue > sensorMax) {
+      sensorMax = sensorValue;
+    }
+
+    // record the minimum sensor value
+    if (sensorValue < sensorMin) {
+      sensorMin = sensorValue;
+    }
+  }
+
+  // signal the end of the calibration period
+  digitalWrite(13, LOW);
+}
+
+void loop() {
+  // read the sensor:
+  sensorValue = analogRead(sensorPin);
+
+  // apply the calibration to the sensor reading
+  sensorValue = map(sensorValue, sensorMin, sensorMax, 0, 255);
+
+  // in case the sensor value is outside the range seen during calibration
+  sensorValue = constrain(sensorValue, 0, 255);
+
+  // fade the LED using the calibrated value:
+  analogWrite(ledPin, sensorValue);
+}
+/*
+Domande:
+1. Modificare lo sketch in modo che modifichi la luminosita' di un led 
+via PWM tramite il valore letto dal sensore.
+2. Come fare per costringere la variabile dentro un intervallo stabilito?
diff --git a/basic/analog_input/photo_6_smooth/photo_6_smooth.ino b/basic/analog_input/photo_6_smooth/photo_6_smooth.ino
new file mode 100644
index 0000000..9d1aa9c
--- /dev/null
+++ b/basic/analog_input/photo_6_smooth/photo_6_smooth.ino
@@ -0,0 +1,68 @@
+/*
+  Smoothing
+ 
+ Legge 10 valori dal sensore e ritorna il valore medio tra questi.
+ 
+ 
+ */
+
+// These constants won't change:
+const int sensorPin = A0;    // pin that the sensor is attached to
+const int ledPin = 9;        // pin that the LED is attached to
+
+// variables:
+int sensorValue = 0;         // the sensor value
+int sensorMin = 1023;        // minimum sensor value
+int sensorMax = 0;           // maximum sensor value
+
+
+void setup() {
+  // turn on LED to signal the start of the calibration period:
+  pinMode(13, OUTPUT);
+  digitalWrite(13, HIGH);
+
+  // calibrate during the first five seconds 
+  while (millis() < 5000) {
+    sensorValue = analogRead(sensorPin);
+
+    // record the maximum sensor value
+    if (sensorValue > sensorMax) {
+      sensorMax = sensorValue;
+    }
+
+    // record the minimum sensor value
+    if (sensorValue < sensorMin) {
+      sensorMin = sensorValue;
+    }
+  }
+
+  // signal the end of the calibration period
+  digitalWrite(13, LOW);
+}
+
+void loop() {
+  // read the sensor:
+  sensorValue = smoothRead(sensorPin);
+
+  // apply the calibration to the sensor reading
+  sensorValue = map(sensorValue, sensorMin, sensorMax, 0, 255);
+
+  // in case the sensor value is outside the range seen during calibration
+  sensorValue = constrain(sensorValue, 0, 255);
+
+  // fade the LED using the calibrated value:
+  analogWrite(ledPin, sensorValue);
+}
+// Funzioni
+
+int smoothRead(int sensorPin) {
+//  Legge 10 valori dal sensore e ritorna il valore medio tra questi.
+  int total = 0;
+  for (int i = 0; i < 10; i++) { 
+    total = total + analogRead(sensorPin);
+    delay(2); // Pausa per assestare il senstore
+  }
+  return(total / 10);
+}
+
+
diff --git a/piezo/keyboard_three_pullup_buttons/keyboard_three_pullup_buttons.ino b/piezo/keyboard_three_pullup_buttons/keyboard_three_pullup_buttons.ino
index 1bd4e47..13fc24c 100644
--- a/piezo/keyboard_three_pullup_buttons/keyboard_three_pullup_buttons.ino
+++ b/piezo/keyboard_three_pullup_buttons/keyboard_three_pullup_buttons.ino
@@ -15,7 +15,7 @@
  */
 
 // Please take care of the include path
-#include "/root/arduino/sketchbook-lessons/piezo_mario_tune/pitches.h";
+#include "/home/utente/sketchbook-andrea/piezo/piezo_mario_tune/pitches.h";
 int input[]= {1,2,3};
   int notes[] = {
   NOTE_A4, NOTE_C4,NOTE_E3 };
diff --git a/piezo/piezo_mario_tune/piezo_mario_tune.ino b/piezo/piezo_mario_tune/piezo_mario_tune.ino
index 26c171a..12dc602 100644
--- a/piezo/piezo_mario_tune/piezo_mario_tune.ino
+++ b/piezo/piezo_mario_tune/piezo_mario_tune.ino
@@ -5,7 +5,7 @@
   last updated: 31/3/13
 */
 #include <pitches.h>
-
+//#include "/home/utente/sketchbook-andrea/piezo/piezo_mario_tune/pitches.h";
 #define melodyPin 3
 //Mario main theme melody
 int melody[] = {