This is my first Arduino example sketch – hopefully the first of many.
This sketch allows you to control a 7 segment LED display using an Arduino and a 4094 shift register. Only 4 data pins are used on the Arduino, rather than 8 if you were to control the 7 segment display directly. For this example I used a common cathode LED display.
Simply copy the code below into the Arduino IDE, build the circuit explained in the notes and watch the numbers count up.