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I made myself a small PCB (measuring about 6cm by 5cm). This is what is supposed to happen:
1. Upon power-up, the LED goes red to indicate that the unit is ready for input.
2. I then press any key down (where the contacts in the button meet), then the red led goes off.
3. The correct value is...
I'm in the beginning stages of a project and am just learning how to use an Arduino Uno with a MAX7219 driver with an 8x8 LED RGB Matrix.
I'm using someone's source code to just get a basic understanding of how to put all these pieces together and will then modify it as I need to...
Given a matrix of LEDs (vertical columns / horizontal rows) I plan to draw circles with extreme LEDs staying from 1 to 8 positions from the center (shown in gray).
I came with these 8 distributions and believe they are the best approach to a circle. For eventual reference, consider the start at...