Binary clock
November 14, 2008
Binary clock showing 22:19:59
After having bought quite a few blue LEDs for a reason I don't know any more, and inspired by the blue PCB I got (I actually ordered a green one...), I decided to build a binary clock (like the ones from ThinkGeek). As usually, I've used an Atmel controller, an ATmega8 for that. It is a TQFP version because that is smaller and surface-mounted. The rest of the parts could have been SMD too, but I only had them in through-hole versions. Nevertheless I tried to arrange them in a way that looks nice.
The display is actually in BCD (binary coded decimal) format because that is easier to read.
A timer interrupt counts the time, while another does the multiplexing (one of the four rows is selected by the driver transistors on the right side of the PCB). I can provide the assembly source files if you want them - just drop me a note via mail (see Impressum). The EAGLE files for the PCB have disappeared into digital nirvana while moving from Windows to Linux.
Last modified: October 20, 2009Comments
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