8 by 11 LED display

A basic 8x11 LED display that can be driven by an Arduino or a Raspberry Pi board.

The LED matrix and hardware driver are designed using KiCAD (5.1.6) and the layout is made with perfboards in mind, so the front layer can be used as wires and the back layer for solder traces.

Rendered LED display

Fabricated and assembled LED display

Using the Arduino library

To include and use the display library in sketches made using the Arduino IDE, first the library folder follow the below steps:

• Copy the LED8x11_display_lib folder from LED-display/Software
  • To My Documents\Arduino\libraries in Windows.
  • To ~/Documents/Arduino/libraries/ in linux.

For more details refer to the libraries page on the Arduino website.

• Include the library header in the sketch

#include <LED8x11_display_lib.h>

Using the Raspberry Pi libraries

Python

To use the Python display library follow the below steps:

This Python display library requires the RPi.GPIO Python library. To setup RPi.GPIO refer to PyPI/RPi.GPIO.

• Move to the Software/RaspberryPi/Python/LED8x11_display_lib directory

cd Software/RaspberryPi/Python/LED8x11_display_lib

• Run the Python setup script

Admin/root privilages may be required to install the library

python3 setup.py install

• Import the library in your program

from led8x11displaylib import display8x11

C++

To use the C++ display library follow the below steps:

This C++ display library requires the wiringPi library. To setup wiringPi refer to the official Wiring Pi site.

• Move to the Software/RaspberryPi/Cpp/LED8x11_display_lib directory

cd Software/RaspberryPi/Cpp/LED8x11_display_lib

• Run the make command (this will build the library and all the examples)

make all

• Include the library header in your program using the following line

#include "LED8x11_display_lib.hpp"

• While compilint the program link to both wiringPi and led8x11display

g++ myprogram.cpp -o myprogram -L<path/to/Cpp/folder>/build/lib -L/usr/lib -lled8x11display -lwiringPi ...

To reset/clean the C++ objectfile run the following in Software/RaspberryPi/Cpp:

make clean

License

The Software and firmware of this project is licensed under the the MIT license however the hardware is under the Open Source Hardware license.

To do

• Firmware driver and APIs for Raspberry Pi.
  • Example code (Python and C++)
• Documentation for hardware