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...
Hello all,
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...