The image shown below indicates the basic wiring diagram of the current limiting resistors and driver transistors. Next is the Hookup diagram of the Arduino 4-Digit 7-segment LED Display, followed by ...

The following Arduino Sketch tests the four-digit, seven-segment LED display. Needless to say ... for two other popular libraries — the “TimerOne” library and the “Wire” library. Because the beeper ...

Now look at what those display modules are mounted on. That’s right, [Kemley] is using point-to-point soldering to rig up this big display. It sports four sixteen segment modules on top for ...