display characters from the alphanumeric keypad on the 7-segment display turn on LEDs in the 8x8 matrix when keys are pressed on the 4x4 keypad display some patterns using the 4-color LED bar use four ...

HT16K33_Font3x3.h a-z (3x3), 0-9 (3x4) 4x4 Row bytes, letters have col 3 & row 3 blank font3x3_drawChar(matrix, ch, row, col) HT16K33_FontDigits4x8.h 0-9 4 cols, 8px tall Column bytes, two digits fill ...