SIK_circuit02_potentiometer copy copy copy copy copy copy copy by hollomanmesakids

Measure the position of a potentiometer and use it to control the blink rate of an LED. Turn the knob to make it blink faster or slower!

###Hardware connections: ####Potentiometer: Potentiometers have three pins. When we're using it as a voltage divider, we connect the outside pins to power and ground. The middle pin will be the signal (a voltage which varies from 0 Volts to 5 Volts depending on the position of the knob). * Connect the middle pin to ANALOG IN pin 0 on the Arduino. * Connect one of the outside pins to 5V. * Connect the other outside pin to GND. (TIP: if once your program is running, the knob feels "backwards", you can swap the 5V and GND pins to reverse the direction.) ####LED: Most Arduinos already have an LED and resistor connected to pin 13, so you may not need any additional circuitry. But if you'd like to connect a second LED to pin 13, or use a different pin, follow these steps: * Connect the positive side of your LED (longer leg) to Arduino digital pin 13 (or another digital pin, but don't forget to change the code to match). * Connect the negative side of your LED (shorter leg) to a 330 Ohm resistor (orange-orange-brown). * Connect the other side of the resistor to ground. ###Wiring Diagram