# 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

![](Breadboard.PNG) 

## Schematic Symbol

![](Schematic.PNG) 

## Description

![](segment7commoncathode-elements.png)

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. 

## Properties

| Property | Description |
| :---            | :--- |
| [Color](#Color) | The color of the LED indicator  |

### Color

Color of LED.  

Default Colors:

* Red
* Lime
* Aquamarine
* Yellow

You can also you any [Named Color](../../namedcolors.html)

## Useage
 
![](segment7commoncathode-usage1.gif)

* The pins are scanned to create alphanumeric patterns.

![](segment7commoncathode-patterns.png) 

| 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