Software code for Arduino Uno is written in Arduino programming language and compiled using Arduino IDE. The file name is led_matrix_7x5_efy.ino, compiled in Arduino IDE. The program can be downloaded from end of the article and the algorithm is described in the program using comments. The program is uploaded to Arduino Uno by clicking Upload in Arduino IDE. Select the correct board and COM port before uploading the code.
Construction and testing of Arduino LED Project
An actual-size, single-side PCB of the 7×5 LED matrix is shown in Fig. 2 and its component layout in Fig. 3. Proposed LED matrix arrangement is shown in Fig. 4.
Mount the components as shown in the PCB layout. Then, install Arduino IDE in your computer. Open the program and upload it to Arduino board. The LEDs should start glowing.
To test the LED matrix board, check and ensure each LED is in its respective row and column.
For initial testing of Arduino board, upload a simple program like Blink from the example sketches in Arduino IDE.
Download PCB and Component Layout PDFs: CLICK HERE
Download Source code: CLICK HERE
Jacob Abraham and Allen Mathew are electronics enthusiasts from Amal Jyothi College of Engineering, Kottayam