yesterday I stumbled about this: http://qlocktwo.com/
Its a total awesome clock!
But I saw the price tag with about 850€, this fine piece of art is way too expensive…
So I thought this should be no problem for my Spider board.
But sadly there arent enough IOs.
How can I solve this?
Are there any modules expanding my IO Ports?
Maybe I dont need IOs only some Outputs to turn on and of the LED…
Awesome clock! Believe me, the time you spend on the driver will be peanuts compared to the time you will spend on converting the current time to a readable sentence
Can you really drive those without a constant current driver? FWIW, there are LED driver chips out there, but they typically support only 16 LEDs per chip.
Is 10mA per pin sufficient? That would be about 1/2 what a typical LED uses, right? Even at that, 100 LEDs at 10mA per LED = 1000mA, assuming you’re not using any sort of switching or multiplexing scheme.
Is that calculation correct? 1A is pretty significant draw – more than USB would provide.
I haven’t played with the maxio board. Looks really cool.
@ Eric: they have a dutch version of the clock, see this page http://qlocktwo.com/info.php?lang=en and wait until the image scrolls to the left (it’s the purple one)