WORD CLOCK is an illuminated wall clock that displays the time in words. The time is presented by a set of words creating a full sentence of the time every 5 minutes. Small LEDs in the bottom line allow time reading to the minute. The fascia is red vinyl behind a clear plexiglass screen. Each illuminated words is made up of an array of 110 of white LEDs, one for each letter of each word.
(Please also see version 2 of the design that uses addressable LED strips)
Illustrations show the transition of the display of 7:34 (notice the bottom centre LEDs) and 7:35
Only a small number of letters in the screen are not illuminated… Which ones and what do they spell?
A central rotary mode switch cycles through the independent setting of the hours and minutes while rotation increments or decrements the adjustment being made. A tri-colour LED and the main display illustrate the time setting mode providing visual feedback as to the function being adjusted.
The housing is built using copper clad fibre-board. The front cavity contains the sections that form each word grouping while the real cavity houses the electronics and control. The electronics consist of an Arduino UNO, a DS3231 Real Time Clock, a custom board of shift registers and LED drivers, a rotary encoder, and myriad ‘word’ boards driving the LEDs making up each letter. The unit is powered by a single 9V DC power supply and a battery back-up in the RTC ensures that the time is maintained over power interruptions.
Please contact me for the source code.
Hope you like the result…