One thing that’s not mentioned anywhere: battery charging, runtime, overall life, and replacement.
Back of the envelope …
It’s 13 mm OD, so something like a CR927 or CR1130 would fit, with capacity 30 to 70 mA·h. The body looks enough like a cylinder to be unscrewed for battery replacement.
Assuming one chip LED lighting the body and two more at each end of a diffuse light pipe around the ring band: each needs 1 mA for moderate illumination, with the microcontroller power rounding off to zero. That gives a runtime on the order of 10 hours, perhaps double with breathing / blinking patterns and less than half with more current. Careful power management could make it run for a few weeks of idle time between uses.
I’m not much of a luxury goods kind of guy, so I’m not in your demographic, but I think that’s enough runtime to get over the “show everybody the new thing” hump, but not enough to prevent disappointment a week later.
Knowing the real numbers would be interesting, if you’re willing to share.
Hi Ednisley, glowing ring use button cell battery (CR927), which means no need to stop waiting for charging, can continue to glow after replacing the battery. And it’s easy to replace the battery.
After many rounds of optimization, constant light mode at least 16 hours of continuous good light effect, sleep state ultra-low power standby (0-10μA)
Luxury at this price? It’s a fun accessory in my view.
I think Ed’s comment matches my buddies opinion…Your reply was valid, But you should have countered with the adorable puppy & girls impending 16th birthday scenario…No one could resist that!!
