Recently, we published an entry-level Arduino project with a single ... or twelve (in place of thirty-two)! The LED segments of the display require current-limiting resistors when powered from a 5 V ...

This is a simple 0 to 9 counter circuit constructed using Arduino! Here, a common cathode 7-segment LED display is connected to Arduino ... Push Switch (S1) input point is at pin 9 of the Arduino.