SparkFun 7-Segment Serial Display - Red4 digit 7 segment displays are really neat little devices, it's a shame that they can be so cumbersome to control. Well, we've solved that problem by making them a little bit "smarter." The SparkFun 7 Segment Serial Display combines a classic 4 digit 7 segment display and an ATMega328 microcontroller allowing you to control every segment individually using only a few serial lines. The Serial 7 Segment Display can be controlled in one of three ways: