Seven segment wall clocks
When I first saw the Velleman
K8009 'Millennium clock' kit in 1999, I knew I had to get one.
Took one evening of soldering work and, hey presto, we had a very
cool 'public space' clock on our student box wall. Many of my
technical minded friends also liked the clock and wanted one. I
built another Velleman kit for one friend. But the Velleman clock
with discrete LEDs was not as good looking as real 7-segment
displays. I decided that I need to create my own clock. Over the
years I have done several different versions:
Kello v1. Created 2001. 45 mm super
bright red displays. Based on Altera MAX7128 CPLD.
Kello v2. Created 2003. 45 mm dual color
displays for hours and minutes, and 38 mm for seconds. Based on
Altera MAX7160 CPLD
Kello v3. Created 2013. 58 mm red
displays. Battery back-up RTC, IR remote control. Based on
PIC18F14K50 microcontroller and SAA1064.
Kello v4. Created 2017. 58 mm red
displays. Battery back-up RTC, IR remote control. Based on
PIC16F1788 microcontroller and TLC5925.
In case you wonder the name 'Kello' it's 'clock' in Finnish.
page created 1.8.2014
last updated 26.12.2017 webmaster@kair.us