jayyhu

7 ms·

1.
by jayyhu 1y ago
The author points out that his changes have already been upstreamed to https://github.com/rp-rs/rp-hal
2.
by jayyhu 2y ago
For the layman, 0 degrees celsius is also a good proxy for the distance to "room temperature" superconductor.
3.
by jayyhu 2y ago
AFAIK the Section 301 tariff (and increases) only applies to parts imported from China/HK. There are lots of manufacturers on DigiKey that make their parts from elsewhere where these tariffs are not assessed. As a data point, I recentl
4.
Intel spinning out RealSense as standalone company(therobotreport.com)
4 points by jayyhu 2y ago|0 comments
5.
by jayyhu 2y ago
Consider a scenario where you're editing a function: function foo() { return a*2.1^2+0.52/2 } So you do a find-all regex "1.*5" and delete all matching occurrences (à la CRISPER) to get: function foo() { ret
6.
by jayyhu 2y ago
While it might be hard for the US to make lithium batteries that are competitive economically, there are still many countries in the world that can make them economically that are not China, eg. SK, Japan, Taiwan, and the rest of SEA. For S
7.
by jayyhu 2y ago
From the article's opening sentence, it's clear that they are being sanctioned for doing business with Taiwan's Fire Agency, and not for any military reasons. A few weeks ago, China announced sanctions on Skydio for selli
8.
by jayyhu 2y ago
Sanction aside, this action is a wake-up call for all US based companies operating in geopolitically sensitive industries that they absolutely need to diversify their supply chain away from China. And in terms of the sanction itself, it’s d
9.
China sanctions US drone maker Skydio(skydio.com)
85 points by jayyhu 2y ago|96 comments
10.
by jayyhu 2y ago
The actual paper describing the construction of the MUSE Stellarator: https://www.cambridge.org/core/journals/journal-of-plasma-ph...
11.
by jayyhu 2y ago
I want to clarify that they actually did build a transistor-like device, and not just hypothesize about it. I missed section 3.2 when I initially skimmed the paper, which demonstrates and shows the results of a working “transistor”. Unfortu
12.
by jayyhu 2y ago
It looks like the editors have amended the title of their article since this was initially posted. The original title was just “3D-printed Active Electronics”
13.
by jayyhu 2y ago
Reading the article, it looks like so far they only have a working resettable fuse (a passive device), and only hypothesize that a transistor was possible with the copper-infused PLA filament. So no actual working active electronics. And fr
14.
by jayyhu 2y ago
They made a video that explains how to navigate the roundabout, and shows what it will actually look like (with yield markings)[1] [1]: https://youtu.be/07_m7HHiZRw
15.
The Original Prusa MK4S Is Here(blog.prusa3d.com)
4 points by jayyhu 2y ago|1 comments
16.
by jayyhu 2y ago
Yep, they explicitly call out that the onboard voltage regulator can work with a single lithium ion cell.
17.
by jayyhu 2y ago
You're right, after re-reading the Power section on the datasheet it seems connecting 5V to the VREG_VIN should suffice to power the digital domains, but if you want to use the ADC, you still need a external 3.3V source.
18.
by jayyhu 2y ago
Edit: See comment below; The RP2350 can be powered by a 5V supply.
19.
by jayyhu 2y ago
Why Germany? Both Netflix and Broadcom are American companies, so isn’t it more logical to pick a venue in the US? Was Broadcom’s case so flimsy (with regards to US patent law) that they had to find an overseas jurisdiction to get a favorab
20.
by jayyhu 2y ago
The alternative is to do what JS does: https://www.destroyallsoftware.com/talks/wat
21.
by jayyhu 2y ago
The STM32 F0/G0/C0 lines come to mind. More I/O, more peripherals and built-in flash. For hobbyist levels, buying 1-10 pcs they are comparable in price to an RP2040 + SPI flash. However at volume pricing, the STM32 MCU's
22.
by jayyhu 2y ago
Also you could potentially damage the on-board voltage converter/regulator, since most aren’t designed to be back-driven from their outputs.
23.
by jayyhu 2y ago
He also has a video on YouTube for Conical slicing (for those that prefer watching videos): https://www.youtube.com/watch?v=1i-1TEdByZY
24.
by jayyhu 2y ago
To add to "capital-intensive": the regulatory framework right now (in the US) for drone delivery is uncertain at best. While most of the rules & regs to enable drone delivery is already finalized & published, a few very im
25.
by jayyhu 2y ago
I think in a more fair world, they should be forced to recall all falsely labeled "Made In USA" products and offer to replace them with real products made in the USA.
26.
by jayyhu 2y ago
They even have a plugin to get Kerbal Space Program telemetry[1]! Could be useful I guess if you want to play without the HUD on one screen and have all the mission info on a second screen. [1] https://github.com/hudsonfoo&#
27.
by jayyhu 3y ago
Also helpful for Stereolithographic printers (SLA/DLP/LCD), since they also don't have inter-layer adhesion issues like extrusion printers.
28.
Japan's SLIM lunar lander miraculously wakes up(cnn.com)
15 points by jayyhu 3y ago|1 comments
29.
by jayyhu 3y ago
NACA and the other published airfoils[1] are generally a good starting point for hobbyist/RC folks. However if you want to eke out that last 5% bit of performance (ie. you are a company/institution), you would start with one of th
30.
by jayyhu 3y ago
While Prusas definitely contain Chinese parts, if your goal is to avoid buying Chinese then buying a product with a diversified supply chain is certainly preferable to buying a product that is 100% from China. Also Delta Electronics is a Ta

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