The Faux Shaux

PComp – Lab 2

Since a potentiometer is just a variable resistor, you connect power and ground, and the third pin is the set voltage.  I inserted the variable voltage into an analog input on the Arduino, which is read in as a value from 0-1023.  I set a series of conditions that would check the voltage, and change brightness of two LEDs.

Here are the settings I used:

if (potPos < 300 && potPos > 100)  //potPos is the value of the potentiometer

{

analogWrite(ledYlw, 125); //half brightness

analogWrite(ledRed, 0); //off

}

else if (potPos > 300 && potPos < 800)

{

analogWrite(ledYlw, 0);

analogWrite(ledRed, 125);

}

else if (potPos > 800)

{

analogWrite(ledYlw, 255);  //both full

analogWrite(ledRed, 255);

}

else

{

analogWrite(ledYlw, 0); //both off

analogWrite(ledRed, 0);

}