Ductapemaster

9 jam yang laludiscuss

This is cool! I have recently been building a "life admin" system that is focused around keeping track of bills and insurance reimbursements, and I am currently extending it to support a recipe database. My data model is markdown + CSV, but it has reached a point where a real database would be helpful. I'll check this out as it may be a good migration. Thanks for sharing.

Ductapemaster

2 bulan yang laludiscuss

In simple terms, this works by doing an XOR on the outputs and if they disagree, performing a fault recovery.

There's also space systems that use 3 processors and a majority vote for the correct output, but that's different.

Ductapemaster

10 bulan yang laludiscuss

It's not about the whole microcontroller having less than 64kB of memory - it's that each WASM module has a minimum memory size of 64kB, regardless of how much it actually requires. Also, if you need 65kB of memory, you now have to reserve 2 pages, meaning your app now needs 128kB of memory!

We're working on WASM for embedded over at atym.io if you're interested.

Ductapemaster

12 bulan yang laludiscuss

I use this app on all my Macbooks — it's great!

Ductapemaster

12 bulan yang laludiscuss

I've always wanted a Shaper Origin, but the cost and subscription fee required for accessing some features always turned me off. I don't need it for anything other than fun hobby projects and couldn't justify it. Now I get double the fun: building a tool, and getting to use it! Nice work.

Ductapemaster

12 bulan yang laludiscuss

Sadly, Useful Sensors seems to have pivoted to other edge AI tech and no longer sells this or their person detector.

Ductapemaster

12 bulan yang laludiscuss

I spent a LOT of time on this website as a 90's kid. One of many that inspired me to get an EE degree. Projects like this always felt like some incredible magic, and came with an artistic aesthetic that I find inescapably captivating. We've instead got little bits of black epoxy everywhere these days and it's just not the same!

Ductapemaster

tahun laludiscuss

Thank you (and the GP) for the correction! I'll admit this lesson came to me a decade ago and I am speaking to a rule of thumb I developed as a result. Time to update my knowledge banks.

Ductapemaster

tahun laludiscuss

On your note about capacitor sizes — at my first EE job, my boss taught me about capacitance-voltage derating[0] for ceramic capacitors and it was quite the revelation. There is a significant inverse relationship between the two, which no one tells you about in college!

I'm now very careful to pick ceramic capacitors with enough headroom on their rated voltage as you lose a lot if you're close to the rated value. This curve is dependent on the different ceramic types as well (C0G, X7R, etc). Cheaper ceramics have a steeper rolloff.

For personal projects I am very careful to pick higher quality ceramics (X7R if I can) and use caps rated to 2-3x my operating voltage. Likely overkill, but I'm not optimizing for cost at volume.

[0] https://resources.altium.com/p/voltage-derating-ceramic-capa...

Ductapemaster

2 tahun yang laludiscuss

I live in Alameda and this place is such a local gem. The owners are really genuine people too. Great place to spend some time!

They also own a whole warehouse out at Alameda Point filled with machines. I know they have provided some form of access to the public in the past, but I'm not sure what that looks like today.

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