IFD:PhysicalComp2011/Dianna Mertz: Difference between revisions

IFD:PhysicalComp2011/Dianna Mertz (view source)

Revision as of 19:01, 15 December 2011

1,195 bytes added , 15 December 2011

no edit summary

Diannamertz

171

edits

@@ Line 27: / Line 27: @@
    Serial.println(phone.rssi());<br>
-[http://www.uni-weimar.de/medien/wiki/IFD:PhysicalComp2011/code#III_Potentiometer_.28Arduino.29 <b>Photo Resistor Code Example</b>]
+[http://www.uni-weimar.de/medien/wiki/IFD:PhysicalComp2011/code#III_Potentiometer_.28Arduino.29 <b>Photo Resistor Code Example (from class)</b>]
+  // specify the pin numbers we are going to use:<br>
+  int ledPin = 13;<br>
+  int potiPin = 3;<br>
+  // create a variable to hold the value from the poti:<br>
+  int potiValue;<br>
+ <br>
+  void setup(){<br>
+  // set the pin mode of the led pin to  act as an output:<br>
+  pinMode(ledPin,OUTPUT);<br>
+  // establish a serial connection:<br>
+  Serial.begin(9600);<br>
+  }<br>
+ <br>
+  void loop(){<br>
+  // read the current value of the poti pin <br>
+  // and store it in the variable potiValue:<br>
+  potiValue = analogRead(potiPin);<br>
+ <br>
+  // if the value is over a certain threshold<br>
+  // (here it's 511 or the middle of the range),<br>
+  // turn the LED on, otherwise turn it off:<br>
+  if(potiValue > 511){<br>
+    digitalWrite(ledPin,HIGH);<br>
+  }else{<br>
+    digitalWrite(ledPin,LOW);<br>
+  }<br>
+ <br>
+  // in oder to send the poti value as one byte (0-255)<br>
+  // we have to scale it from the original range (0 - 1023):<br>
+  int scaledVal = map(potiValue,0,1023,0,255);<br>
+  // send the scaled value via the serial port as a byte:<br>
+  Serial.print(scaledVal,BYTE);<br>
+  // wait a little bit to not overload the serial buffer:<br>
+  delay(50);<br>
+  }<br>
+<br>
 <b>Equipment:</b>
 <br>