snops

6 ms·

1.
by snops 6mo ago
Many airlines are going much further than this, for instance Virgin Atlantic ban you from either charging or charging from any power bank, and you can't keep them in the overhead locker, you must keep them next to you in case it starts
2.
by snops 9mo ago
TFA does directly mention the NPU "Arm-China Zhouyi: 30 TOPS (Dedicated)" "you cannot simply use standard versions of PyTorch or TensorFlow out of the box. You must use the NeuralONE AI SDK." Neon is a SIMD instruction s
3.
by snops 9mo ago
Really neat clean code! I like the single C file, but Docker if you want all the examples approach, that's really convenient for embedded. Test coverage looks good as well, be interesting to see the metrics. This would be quite cool fo
4.
by snops 1y ago
It would be operating off rectified DC (like an induction hob) or using a SMPS operating at ultrasonic frequencies to deliver a lower DC voltage, you wouldn't get the 50Hz buzz even if there was a transformer.
5.
by snops 1y ago
The best part I find about ChargerLab teardowns is identifying all the passive and discrete components. Western distributors tend to only stock western/japanese brands of these, but they can make up a sizable fraction of the BOM (espec
6.
by snops 1y ago
It can, it just needs the two resistors, which is the cheapest possible thing the standards committee could have asked manufacturers to do. USB-C gets complicated at the high end, but for basic functionality I think the standards committee
7.
by snops 1y ago
I think the most recent surge is due to LLMs, the only way to (easily) apply them is to have some form of code like textual representation of your problem domain so "circuits as code" is the obvious way to wedge them into electron
8.
by snops 1y ago
The article links to a Linux implementation that does it with off the shelf WiFi hardware. You do need specific features in the hardware/firmware, but there are consumer devices that have that e.g. Atheros AR9280. https://gi
9.
by snops 2y ago
The cable is cooled by a mix of water and glycol, which runs through the cable and also cools the connector pins. Tesla use this in their supercharger cables, as without it the cable would be too heavy. https://www.cpcworldwide.c
10.
by snops 2y ago
Marimo does this for python, by tracking dependencies. https://marimo.io/
11.
by snops 2y ago
This is really well documented with lovely schematics, and the link in the github to the proper "korg style" toggle switches [1] on AliExpress is worth the read. The code [2] is very nice as well, showing how clean a bare metal Pi
12.
by snops 2y ago
Smallest Swissbit do is 512MB, but that's as it's SLC flash so far lower capacity. https://www.swissbit.com/en/products/product-finder/products... Looking at pricing, 1GB is only about 25% more in u
13.
by snops 2y ago
Brushless drone motors suffer from too high a kV (~operating RPM), needing a lot of gear reduction for this kind of application, but I take your point about volume. Gimbal motors (also in drones) are closer to what is needed, and often come
14.
by snops 3y ago
Reducing the RAM requirement to 8GB to fit this on my Macbook Air M2 (with room left for other running apps), I get the same figure (66 GB/s) regardless of the number of threads. If I actually set it to the size of physical memory perf
15.
by snops 3y ago
You can "freeze" micropython modules and have them saved in flash with Micropython, where flash only stores the precompiled bytecode. If your module contains stored data in the form of an immutable object, like a string or bytes()
16.
by snops 3y ago
Some other existing options in this space (not all web based) are - https://pymeasure.readthedocs.io/en/latest/ python Framework for running science experiments, getting hardware to go through a set of steps and p
17.
by snops 3y ago
If its "just storage", how is it any better for this application than a zip file?
18.
by snops 3y ago
This sales pitch ignores cloudflare workers, which sound pretty similar to me, with both webassembly and key-value storage. The distinguishing part of the articles option seems to be that webassembly functions are uploaded in an OCI contain
19.
by snops 3y ago
Texas Instruments has also done interesting work in this area with "Compute Through Power Loss" where they use the non volatile FRAM in some MSP430s as working memory [1] I don't think it needs the kind of compiler tricks thi
20.
by snops 4y ago
There is the mikrobus, grove, and qwiic connectors, all of which will be GPIO, I2C and likely (for Mikrobus) SPI as well. The reason the SoC says "up to 170" as they are multiplexed with the ethernet, display and camera interfaces
21.
by snops 4y ago
Its (presumed) competitor, MIPI-CSI is not open source either. SLVS-EC looks easier to interface with an FPGA at least, presumably the voltage levels are closer to standard, unlike MIPI D-PHY's exotic dual level switching that either r
22.
by snops 4y ago
For production,its best to specify the important properties as you say, then let the contract manufacturer figure it out, rather than spend ages finding the cheapest 100nF 10V X5R 0402 cap. If it really matters, then add a "no subsitit
23.
by snops 6y ago
There is hardware available with the same microcontroller (ESP32) in a thick watch style case, but I don't know if anyone has ported meshtastic to it yet. On the face of it, power usage looks a bit higher due to the LCD display rather
24.
by snops 6y ago
Very interesting how they made this work on iOS, given so many failed (before the Apple/Google protocol was released). A lot of the design documentation references the UK market, I wonder if VMWare were asked/volunteered to help w
25.
by snops 6y ago
The DDC interface, which is an I2C bus that allows for bidirectional communications to read EDID data, so you know what you are plugging into. Hot plug detection via the HPD line, so you can tell if you are plugged in or not. Embedded 5V po
26.
by snops 6y ago
See also Heatshrink[1] based on LZSS [1] https://spin.atomicobject.com/2013/03/14/heatshrink-embedded...
27.
by snops 6y ago
The command line interface eCos has to call any C function sounds interesting, I wonder if there is a standalone library to do this on other platforms. To further boost performance, it might be worth skipping past interrupts and going strai
28.
by snops 6y ago
SVD is this machinine readable description, and is available for most ARM micros, as it is needed for the peripheral register view in debuggers. svd2rust [1] is an project that generates a (very low level) Rust API for a specific micro from
29.
by snops 6y ago
If anyone wishes to read it or similar European standards, each nation is required to sell it at a price proportional to the average wage, and hence the Estonian standards body is selling it[1] for €14, instead of the £204 the British stand
30.
by snops 6y ago
You can use Protothreads[1] for this which work on anything that runs C, as they are just using setjmp/longjmp. I would recommend FreeRTOS instead, as it has proper prempetive scheduling, context switching and wide debugger support. It

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