Segment7 (Common Cathode)¶
The SEG7 component is a 7-Segment Display module, which consists of a versatile array of LEDS which can be sequenced to form numbers and a limited form of alphanumeric character.
Breadboard Footprint¶
Schematic Symbol¶
Description¶
8 LEDS A, B, C, D, E, F, G, PT are physically arranged on the 7-Segment device. When the common cathode pins 3 and 8 are connected LOW then 7 segment elements will become activated with a HIGH level. Thus when A LED Segment is ON when HIGH is applies its corresponding input pin and is OFF when 0V LOW is applied. When the appropriate patterns are applied to the inputs, 7-Segment display modules are able to display numbers and ASCII characters.
PinOut¶
| Pin | Name | Description |
|---|---|---|
| 1 | E | E LED Segment Input. HIGH = ON, LOW = OFF |
| 2 | D | D LED Segment Input. HIGH = ON, LOW = OFF |
| 3 | Cathode | Common Cathode, HIGH = ALL OFF, LOW = ON When Segment Pin = HIGH |
| 4 | C | C LED Segment Input. HIGH = ON, LOW = OFF |
| 5 | PT | Decimal Point LED Segment Input. HIGH = ON, LOW = OFF |
| 6 | B | B LED Segment Input. HIGH = ON, LOW = OFF |
| 7 | A | A LED Segment Input. HIGH = ON, LOW = OFF |
| 8 | Cathode | Common Cathode, HIGH = ALL OFF, LOW = ON When Segment Pin = HIGH |
| 9 | F | F LED Segment Input. HIGH = ON, LOW = OFF |
| 10 | G | G LED Segment Input. HIGH = ON, LOW = OFF |
SPICE¶
Supports a standard 0.7v voltage-drop accross each LED.
Roadmap: support parametric voltage-drop.
OpenVBB¶
LED’s activate when HIGH if common cathode pins are LOW.
Useage¶
The pins are scanned to create alphanumeric patterns.
| Binary | Char | A | B | C | D | E | F | G | PT | HEX |
|---|---|---|---|---|---|---|---|---|---|---|
| 0000 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | FC |
| 0001 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 60 |
| 0010 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | DA |
| 0011 | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | F2 |
| 0100 | 4 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 66 |
| 0101 | 5 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | B6 |
| 0110 | 6 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | BE |
| 0111 | 7 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | B4 |
| 1000 | 8 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | FE |
| 1001 | 9 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | F6 |
| 1010 | A | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | EE |
| 1011 | B | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 3E |
| 1100 | C | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 9C |
| 1101 | D | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 7A |
| 1110 | E | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 9E |
| 1111 | F | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 8E |
| 1111 | G | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | BC |
| 1111 | H | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 6E |
| 1111 | I | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 60 |
| 1111 | J | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 78 |
| 1111 | K | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 5E |
| 1111 | L | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 06 |
| 1111 | M | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | AA |
| 1111 | N | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 2A |
| 1111 | O | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 3A |
| 1111 | P | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | AE |
| 1111 | Q | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | E6 |
| 1111 | R | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0A |
| 1111 | S | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | B6 |
| 1111 | T | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 8C |
| 1111 | U | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 7C |
| 1111 | V | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 7E |
| 1111 | W | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | D8 |
| 1111 | X | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 07 |
| 1111 | Y | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 76 |
| 1111 | Z | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 92 |
| 1111 | . | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 01 |
| 1111 | + | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 62 |
| 1111 | - | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 02 |
| 1111 | ( | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1A |
| 1111 | ) | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 32 |
| 1111 | _ | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 10 |
| 1111 | SPACE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 00 |