Resources:
- https://www.arduino.cc/reference/en/
- https://fritzing.org/ -> Circuit designer (the most used apparently), open-source
Prints letters to the matrix of LEDs. Made in 2019
1_8x8_led_matrix_simple_letter_prints.mp4
Turns on an RGB led when it's dark, using a photo resistor. Gives emphasis on blue (which is hard to set). Made in 2023