jamesh wrote:Nope. It's still 'small', and it's not 4x more expensive, one you add the extra connectors you might need (which of course is the point of this thread). But of course, there will always be times when you want something that small, for which the Zero will be fine.
But for general Pi use? Go with the B2! Forget the zero unless you specifically need what it offers. And the Zero will always be difficult to get hold of since production will never be at the same levels as the other Pi's, simply because the profit margin is so small. You couldn't run a business, or indeed a charity, on it. A bit like C.H.I.P..
So you, personally, are saying that you believe that the Zero is just a marketing come-on, created just to show up the C.H.I.P. price-wise. I don't believe that's the Foundation's goal for the Zero for a femtosecond and it would be more than nice for us to hear what the actual expectations for it are in terms of delivery into students' hands from someone who can speak authoritatively. I can tell you that from Out Here in the Real World, for those who can support their organizations, or for whom they have support or can arrange it, the $5 price of the Zero is a complete game-changer. Some of us are dedicated to getting computing components into the hands of everyone and anyone of any age who wants to learn, and the lower every single one of the barriers to entry is, the easier that becomes, and the sooner, the better.
Very little that the Foundation does has anything to do with the revenue it receives after development and production costs are deducted (it's not "profit" - charities are, by definition, non-profit organizations). If the Foundation was able to deliver only the Zero for $5 based on volunteer work (including yours, and thank you all very much for that), they would be contributing more not just to STEM and computing education, but education across all curricula than all of the other models, combined. We can't develop and produce a $5 Zero Out Here, but we sure can shop until we drop to beg, borrow, and steal (in the virtual sense, of course) everything else needed to get Zeroes in our students' hands so they can learn way more than you could ever imagine.
BTW, the Zero isn't just much smaller and less expensive than the other models, it's currently 40% faster, and has twice the DRAM than the A+ has. The latter does cost four times as much as the Zero because, other than the GPIO header pins (which cost nearly nothing, including soldering), the A+ needs the same cables, adapters, peripherals, and accessories that the Zero does for the same I/O functionality (i.e., no CSI or DSI needed, which is very typical).
The best things in life aren't things ... but, a Pi comes pretty darned close!
"Education is not the filling of a pail, but the lighting of a fire." -- W.B. Yeats
In theory, theory & practice are the same - in practice, they aren't!!!