buescher

16 ms·

271.
by buescher 2y ago
You would think about a lot of the things that they do, "how hard can it be?". Take a look at the simplified example statechart here (scroll down) for a power window control and ponder all the ways an embedded programmer could
272.
by buescher 2y ago
Ladder logic is sort of a similar case right? Supposedly it derives from notation for documenting relay racks in factory automation that could very well date to the 1800s. And it's a pretty brilliant implementation - you don't
273.
by buescher 2y ago
Bingo. Additionally, control theory block diagrams are pretty rigorous, with algebraic rules for manipulating them you'll find in a controls textbook. You can pretty much enter a block diagram from Apollo documentation into Simulink
274.
by buescher 2y ago
If you’ve been socialized not to really believe anything is really real, and your life is mostly spent in social modulation, physical danger that doesn’t register immediately with the hindbrain can really trip you up. I know of a scenic ove
275.
by buescher 2y ago
I grew up in the surrounding area. Tourists, and some locals, died every year, frequently at Yellowstone. Relevant Baudrillard quote: > Disneyland exists in order to hide that it is the “real” country, all of “real” America that is Dis
276.
by buescher 2y ago
The Nordic Thingy dev platform is available in both Bluetooth Low Energy Long Range and cellular versions. It has everything you need. More expensive than a cast-off cell phone for a one-off though.
277.
by buescher 2y ago
I hadn't specifically seen MoSCoW before. Some people need to have everything spelled out for them, I guess.
278.
by buescher 2y ago
Reinertsen's books are very, very good. The most recent and most up-to-date is Principles of Product Development Flow, which that chart came from. The previous one, Managing the Design Factory, is pretty similar and I think it's
279.
by buescher 2y ago
What's sort of neat with a Raspberry Pi - as far as retrocomputing - is that you can run RISC/OS, the operating system for the Acorn Archimedes, which was the first ARM computer and sort of the British Amiga. On real ARM hardware
280.
by buescher 2y ago
Or you can buy in person from Walmart. For the volume he's probably doing, that's not as impractical as it might sound.
281.
by buescher 2y ago
That system, Unit, was on the front page here about a week ago: https://news.ycombinator.com/item?id=40900029 It's got a certain aesthetic appeal but I don't find it self-explanatory either.
282.
by buescher 2y ago
Simulink is based on the block diagram notation used in control theory for decades earlier - before personal computers and workstations. The notation is rigorous enough you can pretty much pick up a book like the old Electro-Craft motor h
283.
by buescher 2y ago
Ampro, who would go on to create the PC104 SBC motherboard standard, got their start with a cp/m computer that would mount right on a 5 1/4" floppy drive: https://oldcomputers.net/ampro-little-board.html
284.
by buescher 2y ago
You can get an experimental license from the FCC. Clinical trials are a specific example of what that process is for: https://apps.fcc.gov/oetcf/els/help/442_License_Types.html
285.
by buescher 2y ago
You can sell kits, because companies do. Kits are only required to be authorized in very specific rules for specific types of kits. However, devices assembled from kits are not exempt from FCC authorization requirements. Home built devic
286.
by buescher 2y ago
It's complicated! If it's not a transmitter, then it's not certified (this has a meaning), you just need to have acceptable data on hand for your Supplier's Declaration of Conformity (SDoC). Then if you make any chang
287.
by buescher 2y ago
The NFPA writes the national electric code. They also came out of the insurance industry, and like UL and FM, predate adoption of their standards in regulation. FM is an actual insurance company but it is not OSHA. The history is similar
288.
by buescher 2y ago
This new type of personal computer runs... xlib and twm. I like this person, but, uh, I'm not investing.
289.
by buescher 2y ago
What an odd person. I can't figure the Estonia thing out either. I think the idea is to provide plausible deniability that the company is operating in the EU??? By incorporating in the EU but doing nothing else there? I can&#x27
290.
by buescher 2y ago
This is all good information. I'd only add: You left out Canada. IC certs are kind of a pain because some of their rules are very slightly different plus you need a representative in Canada. UL standards can be read (but not download
291.
by buescher 2y ago
You can find statements and notices and citations and such on the FCC web site to see what happens if you get caught out. If you're interested in that kind of thing, they're interesting reading. Here is a pretty bad scenario for
292.
by buescher 2y ago
Amazon absolutely requires sellers to supply FCC certification and Suppliers' Declaration of Conformity documentation for FCC regulated devices. You can report any noncompliant products to them and they do remove them. Just wait till
293.
by buescher 2y ago
It's not expensive. What does a week of a good hardware engineer's time cost? It's not even necessarily that expensive: $3K-$5K is a good budgetary range if you don't have any pre-compliance test and engineering capabil
294.
by buescher 2y ago
The go-to resources are the FCC regulations and guidance documents. Be very careful with anything written to an indie maker audience. FCC regulations have the force of law and you are ultimately responsible for compliance: not the guy you
295.
by buescher 2y ago
Because they're poor. Same reason people in Idaho eat Oregon potatoes.
296.
by buescher 2y ago
For professional embedded development, where reproducible-in-the-future builds are frequently valued, it's common, when possible, to set up your whole toolchain in a vm that's kept under version control.
297.
by buescher 2y ago
Compilers for the 6502 are tricky, because of its limitations and idiosyncracies. There was a well-received port of a language called Micro-SPL to the 6502 for the Atari 8-bit computers called Action!. The original incarnation of Micro-SP
298.
by buescher 2y ago
Imagine what a piece of junk Microsoft Paint would be if it actively tried to keep you from making naughty doodles.
299.
by buescher 2y ago
Pretty much that, remembering that you probably didn't have a microwave. Nobody bought a microwave just to get away from aluminum foil. I hear you on the convection oven, but the real game changer for me was moving into a house with a
300.
by buescher 2y ago
They took forever in the oven, plus however long it took your oven to heat up.

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