“A 3D printed tiny word clock build using a 8x8 LED matrix and ATtiny1614 microprocessor.
Back in 2017, I built a large Word Clock designed by wabbitguy. Recently I came across a word clock based on a 8x8 Matrix by gfwilliams. He used a 30x30mm LED matrix with a printed label to define the letters. Unfortunately the letters are too small to 3D print them using my FDM printer. So I decided to use a 60x60mm LED matrix instead in my design.
Setting the time
Word based matrix style clocks are generally only accurate to 5 minutes owing to the lack of words they can show. The time held in the clock still needs to be accurate to at least one minute.
By pressing the SET button, the letter H flashes in the top left corner of the display to denote that the hours are being set. The hour value is shown as two 7-segment digits. The UP and DOWN button will change the hour value from 0 to 23.
When the SET button is pressed again, the letter M flashes in the top right corner of the display to denote that the minutes are being set. The minute value is shown as two 7-segment digits. The UP and DOWN button will change the minute value from 0 to 59. Holding the UP or DOWN button down will increment or decrement the value automatically.
Pressing the SET button again will set the time and return the display to the Word Clock face.”