The coffee maker in this hotel room has a sticker "with intellibrew" and I would just like the damn thing to work. It is a terrible idea to add 500 million transistors to a device just because you can & it's cheap. Terrible.
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Replying to @halvarflake @bofh453
an interesting question: how many transistors is too many? your device probably doesn't have 500 million or even 5, though still a fair bit. a low-end device would have some tens of thousands in an ASIC or a 4/8-bit micro. is that fine? when it becomes not?
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Low end cortex m0 is a few ten thousand gates?
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I suspect the right number would be the minimum required to construct the FSM for the machine to perform its functions? Or within an order of magnitude of that minimum?
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Replying to @halvarflake @bofh453
so what do you do when you find a bug in that FSM? do you respin the ASIC? of course not
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It doesn't even justify an ASIC; discrete components suffice & would likely dominate cost either way.
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good fucking luck making a PID controller out of discrete logic. I for one am glad we aren't stuck in 80s anymore.
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I think we just have different expectations for what a coffee maker needs to do. :-)
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if you're satisfied with open-loop control on anything that heats food, I weep for your standards
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Heating water is a lot easier than heating food because the water provides all the control you need except stop/fail-safe.
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