Arduino Applied: Comprehensive Projects for Everyday Electronics

© Neil Cameron 2019

Neil CameronArduino Appliedhttps://doi.org/10.1007/978-1-4842-3960-5_5

5. 7-Segment LED Display

Neil Cameron¹ 

(1)

Edinburgh, UK

 

Numbers and characters displayed on electronic devices use modules of seven LEDs with an eighth LED for the decimal point. Conventions for labelling the LEDs are a, b, … g or A, B, … G, with the decimal point denoted P or DP. There are 10 pins on the 7-segment display with pins 1 to 5 corresponding to LEDs e, d, common, c, and P with pins 6 to 10 mapping to LEDs b, a, common, f, and g. The two common pins, 3 and 8, are connected to a common cathode or common anode (see Figure 5-1).

Figure 5-1

7-segment LED ...