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how to use NFC tags
u should sell these the cheapest one i can find is 20 bucks
id gladly buy one for 10
yes but if you skip the power regulator the pro mini you can power the chip directly, which saves power, also a esp8266 would be awesome for this.
you could probably skip the boost converter and skip the arduino voltage regulator to save on power becuse the ardiuno can handle the max 4.2 volts from the battery just fine i have found, also the neo pixel ring can run on less voltage as long as you dont turn on to many of them at once. I was working on a project like this a while ago I ended up sanding down a 3v pro mini to fit inside the middle of the ring, and wiring the battery straight into the vcc of the arduino, and not useing a RTC as i found that as long as its within 5 min it ok, and I got away with useing a 400mah battery that would last 3 days. but iam horrible at coding so i bet you could optimize that code a bunch becuse I couldn't figure out how to get the time to display when you hit a button so I just had the button connect the neopixel vcc.
if i were to use a arduino micro what rifid module would work? also would this work with nfc
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