ATTO

Fingernail Sized Arduino Compatible Board

Screenshots

Hunter's comment

This tiny little board claims to be "the worlds smallest Arduino Compatible Board" Its basically an arduino the size of your fingernail. There are lots of small boards about these days but I have not seen one as small as this, or with as much on board as this. Its only $13.90 if you pre order.

Atto's tiny profile allows it to fit into any miniature projects! Perfect for wearables and portable devices.
Our expansion boards will help you prototype and complete your projects faster. Additional accessories and add-ons, such as battery power shields, will be coming soon!
Source - nionics

Link

https://nionics.com/