An Arduino 6-LED sequencer, rewritten from C++ to run on inline AVR assembly. It's a dive into low-level microcontroller programming, proving that assembly still has its place, even for a "simple" ...

For connecting 5 RGB LEDs to Arduino we need 5x4= 20 PINS usually, by we are going to reduce this PIN usage to 8 by connecting RGB LEDs in parallel and by using a technique called multiplexing.

The schematic is shown in Figure 1, indicating the connections between the Arduino and LED matrix. The row and column identifier for each LED is in parentheses — for example, (1, 2) means that the ...