Over on the ch00ftech blog they have a really good post about their adventures prototyping their QR Clock 2.0.

After the success and popularity of my original QR Clock, I decided it might be a fun challenge to redesign the clock into a more attractive and lower-cost form factor.  The end goal is to make this the flagship product that gets my Ch00ftech Store on its feet.  Before I could start worrying about manufacturing and shipping, I needed a new prototype, so this post is to tell you about what I’ve changed.

I addressed a number of mechanical and electrical problems that I had with the original design, but this time around, I’ve also addressed some of the pricing and supply chain issues I had before.  This clock is actually much cheaper to make than the original, and getting it that way involved some new experiences for me.