It was back in 2013. I kept building prototypes with different parts until I got the price down enough to sell them for like $160, only accepted bitcoin.
The unit in the picture is one of the prototypes that I soldered up entirely by hand.
Discussion
Wow! Need to start a bitaxe and hacked factory. Haha. 🤔
Was actually thinking of bitaxe
https://emberone.org probably more fun in the future.