7 Bi-color LED Matrix Scrolling Text Display
The reason for building a 7 LED Matrices long display is that it is quite adequate for ease of reading scrolling text and also because the largest tinted acrylic sheet easily available in Hobby or Art shops is 18 inches by 12 inches, which is just the right length for making the enclosure for the display as each LED matrix is around 60mm x 60mm in size.
You may view the following YouTube video to see what we are building.
Step 1: LED Matrix Driver Module Assembly
You may view the following YouTube video on the assembly of the Bi-color LED Matrix Driver Module kit.
Step 2: Wiring
After all the kits are completed, they are connected together with the micro-controller as shown (LED Matrices are not installed for better view). Note the header for J3 is modified for the fourth LED Matrix Driver module from the right such that only VCC and GND are connected to the fifth module. This is because the first four daisy-chained modules from the right shall be driven by 3 output pins (Digital pins 2, 3 & 4) from the micro-controller and the last three daisy-chained modules shall be driven by another 3 output pins (Digital pins 5, 6 & 7).
For more detail: 7 Bi-color LED Matrix Scrolling Text Display
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