Oh no- the battery is inserted from the underside of the ring so it pops right out. It will probably cost no more than $15 shipped. That will include the holder, battery and LED board ready to go. You won't have to do any soldering.
Nope- no switch.
You have to remove the battery to turn it off. There isn't room for a switch- believe me I tried!
What burn time on battery you think?
Since the tag is placed underneath the battery it will sit right against your finger so the entire ring will need to be resin. Hopefully the tag will transmit through the battery and LED pcb- as soon as I have time to write some code I'll be doing some testing. I still have several other projects in the works so it'll probably be a while before I get started on it.
Just thought i'd share my latest ring in this threadI'm really happy with how this has turned out.
It features:
Pitted stainless steel band with black oxide weathering
Vibrant green resin gem and face with faux crystalline structure
Stainless ring around the gem
Not the greatest pictures, but these are taken during the day with the sunlight coming through my window
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The tags that small? You have pic of it next to a dime or something?