You know the fun Adafruit 16-pixel LED rings? Well, now they have rings with 24 pixels, too. So if you live in a country that still uses 12/24 hour time, these make it easier to make a clock!
The Arduino’s built in timer drifts too much to be a reliable clock, but you can add a Chronodot and keep great time. You could also use a Teensy3 and solder on a crystal and coin cell battery holder-- it’s got everything else needed for a realtime clock built in.
Hrm, I would’ve put the GND/VCC/DIN on one side of the ring and GND/VCC/DOUT on the opposite side to make it easier to daisy chain. But, that’s just me. Still cool.
Agreed. Think how many 66mm circles you can cut from a square meter of PCB (250ish) vs 45mm circles (500ish).
There may also be some value pricing here. A 24-pixel ring is good for a clock, and lots of people use clocks. The 16-pixel rings are mostly ‘just’ decorative.
Lastly, I think they lowballed the price of the original rings. 62 cents per pixel is much less that they usually charge. Ten bucks for 16 pixels is a bargain. Twenty dollars for 24 pixels (83 cents per pixel) is more in line with their regular pricing.
Well, you know how it is: time zones, the international date line, the metric system, all that. The last thing I want is to be the one guy at the party who’s reporting all his temperature measurements in Rankine degrees.
