Second Test: Digits Display . The following Arduino Sketch tests the four-digit, seven-segment LED display. Needless to say, the LED controller is 74HC595 with its LATCH_DIO wired to D4, CLK_DIO to D7 ...

The finished circuit can display numbers ranging from 0 through 1023, in connection with a 10K preset pot attached to the analog input A0 of the Arduino board. This 4 -digit 7-segment display section ...