X-Git-Url: http://git.piffa.net/web?p=sketchbook_andrea;a=blobdiff_plain;f=basic%2Fanalog_input%2Fphoto_5_calibration%2Fphoto_5_calibration.ino;h=056d6325921811cba3ff0e172b4ff1ef6b56bc2b;hp=ea8ecf8c4a31df50827ae18d1a61a4e5039a438f;hb=487c31ee83fb81e856593ae272d2d76a2a5c1a78;hpb=ae46f04b54f49297dc1e916c575cbdae70095611

diff --git a/basic/analog_input/photo_5_calibration/photo_5_calibration.ino b/basic/analog_input/photo_5_calibration/photo_5_calibration.ino
index ea8ecf8..056d632 100644
--- a/basic/analog_input/photo_5_calibration/photo_5_calibration.ino
+++ b/basic/analog_input/photo_5_calibration/photo_5_calibration.ino
@@ -23,12 +23,13 @@
  http://arduino.cc/en/Tutorial/Calibration
  
  This example code is in the public domain.
+ Schema:  Schema: https://learn.adafruit.com/assets/460
  
  */
 
 // 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
+const int ledPin = 11;        // pin that the LED is attached to
 
 // variables:
 int sensorValue = 0;         // the sensor value
@@ -39,6 +40,7 @@ int sensorMax = 0;           // maximum sensor value
 void setup() {
   // turn on LED to signal the start of the calibration period:
   pinMode(13, OUTPUT);
+  pinMode(ledPin, OUTPUT);
   digitalWrite(13, HIGH);
 
   // calibrate during the first five seconds 
@@ -54,6 +56,7 @@ void setup() {
     if (sensorValue < sensorMin) {
       sensorMin = sensorValue;
     }
+    delay(5); // Let the sensor rest a bit and stabilize
   }
 
   // signal the end of the calibration period
@@ -63,12 +66,13 @@ void setup() {
 void loop() {
   // read the sensor:
   sensorValue = analogRead(sensorPin);
-
+  // in case the sensor value is outside the range seen during calibration
+  sensorValue = constrain(sensorValue, sensorMin, sensorMax);
+  
   // 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);