Olympia Circuits Teases Arduino Programmers With $60 Arno Shield by Ray Willington — Monday, April 29, 2013, 05:50 PM EDT Comments ...

Becky Stern shows you how to use digital and analog inputs when building Arduino circuits, including controlling LEDs using pushbuttons and potentiometers.

The key to the circuit is the low-power, digital-potentiometer 100-kΩ IC3 . Configured as a voltage divider, this IC provides an output of 32 discrete voltage steps between its minimum and maximum ...