So I took the blinking light demo provided with the Arduino platform and expanded upon it. In fact it’s still being expanded upon.
My first creation is a Morse Code Sender that flashes out my amateur radio callsign.
Next up I have to find out what happens to the digital pins when they’re set to low. If they ground out it’s perfect since I can use low state pins on the cathodes of the 8×8 matrix, and since an LED is a diode, it’ll block current flow when the pin is in a high state, if my theory is correct. I’ll be testing that out later on.