A while back I wrote an analysis of fake microSD cards. As a result of the post, I’ve received this question regularly via email: “I’m trying to buy a thousand microSD cards for my embedded controller project. How do you qualify a microSD card?” So, I thought it might be helpful to share my answer here. There’s this awkward phase between the weekend project (where you buy your microSD card from Be
We are building an open laptop, with some wacky features in it for hackers like me. This is a lengthy project. Fortunately, ARM CPUs are getting fast enough, and Moore’s Law is slowing down, so that even if it took a year or so to complete, I won’t be left with a woefully useless design. Today’s state of the art ARM CPUs — quad-core with GHz+ performance levels — is good enough for most day-to-day
Riddle me this: how does a government enforce tax collection in a cash-only society? Cash has the wonderful property of being anonymous, and therefore hard to track. As a result, cash businesses often under-report revenues, thereby dodging a portion of tax payments. China is primarily a cash-driven economy; few local places will accept payment cards of any kind (event rent payments are made in cas
The chumby One is finally released. You can buy it now for a $99 “chumby insider” pre-order price; once we start shipping, the price will go up to $119. While I’ve been working on several new hardware platforms for chumby, this is the first of the crop to hit the market. This one made it out before the Christmas season because it is an evolution of the original chumby design, now called the “chumb
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