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7-segment Displayļ
A 7-segment display is an 8-shaped component that houses 7 LEDs, each referred to as a segment. When powered, each segment lights up to form part of a numeral.
There are two types of pin configurations: Common Cathode (CC) and Common Anode (CA). As the names suggest, a CC display connects all the cathodes of the 7 LEDs, while a CA display connects all the anodes of the 7 segments.
In this kit, we use a Common Cathode 7-segment display. Below is its electronic symbol.
Each of the LEDs in the display is given a positional segment with one of its connection pins led out from the rectangular plastic package. These LED pins are labeled from āaā through to āgā representing each individual LED. The other LED pins are connected together forming a common pin. So by forward biasing the appropriate pins of the LED segments in a particular order, some segments will brighten and others stay dim, thus showing the corresponding character on the display.
Display Codes
To help you get to know how 7-segment displays(Common Cathode) display Numbers, we have drawn the following table. Numbers are the number 0-F displayed on the 7-segment display; (DP) GFEDCBA refers to the corresponding LED set to 0 or 1, For example, 00111111 means that DP and G are set to 0, while others are set to 1. Therefore, the number 0 is displayed on the 7-segment display, while HEX Code corresponds to hexadecimal number.
Numbers |
Binary Code |
Hex Code |
|---|---|---|
0 |
00111111 |
0x3f |
1 |
00000110 |
0x06 |
2 |
01011011 |
0x5b |
3 |
01001111 |
0x4f |
4 |
01100110 |
0x66 |
5 |
01101101 |
0x6d |
6 |
01111101 |
0x7d |
7 |
00000111 |
0x07 |
8 |
01111111 |
0x7f |
9 |
01101111 |
0x6f |
A |
01110111 |
0x77 |
B |
01111100 |
0x7c |
C |
00111001 |
0x39 |
D |
01011110 |
0x5e |
E |
01111001 |
0x79 |
F |
01110001 |
0x71 |
Example
5.2 Displaying Numbers (For MicroPython User)
5.2 Displaying Numbers (For Arduino User)