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[MonoClock] 
[RotClock] 

 

Mono Clock

The mono clock is a time/date display device on a single LED dot matrix display. The time synchronization is done by a long wave receiver.

Time Broadcast in various Countries

 

Behind the upper filter glass a 5 cm - 5 x 7 dot matrix shows the time and/or date. On the lower part you can guess a dim red square, it is a standard shape LED, an additional infrared LED mounted inside the shape LED enhances it to a touch switch for display modes, styles and brightness.

 

Three display modes, seven styles and four brightness steps are selectable by a relatively comfortable menu, considering there is only one digit shown at a time.

 

Display Modes
- time
- date
- alternating

 

 

Display Styles
- horizontal
- vertical
- morph
- blend
- blink
- menu
- alternating
- random

 

(click links)

 

The used controller is a low cost 8 bit RISC type with 2 K FLASH. To make time receiving routines and seven display styles fit into 2 K, the complete programming was done in assembler. A special cellular automata algorithm handles the digit morphing.


Here is a list of time broadcasting services in various countries (country - name - frequency).

Long Wave
Germany - DCF77 - 77 kHz
Switzerland - HBG - 75 kHz
France - TDF - 162 kHz
England - MSF - 60 kHz
USA - WWVB - 60 kHz
Japan - JJY - 40, 60 kHz

Short Wave
Russia - RWM - 4.996, 14.996 MHz
Canada - CHU - 3.330, 7.335, 14.670 MHz
China - BPM - 2.5, 5, 10, 15 MHz
USA - WWV - 2.5, 5, 10, 15, 20 MHz
Hawaii - WWVH - 2.5, 5, 10, 15 MHz
Venezuela - YVTO - 5 MHz

 

 

 

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