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aspiring electronics engineer

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therestlesstechnophile.com 2mo ago

ABM-101

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www.dpreview.com 2mo ago

Sony A7R VI

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7400.me 2mo ago

HP 3585A spectrum analyzer teardown

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hforsten.com 3mo ago

Radar Image Formation Simulator

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electronupdate.blogspot.com 5mo ago

ESP32-P4 Teardown

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fpvwiki.co.uk 6mo ago

The Digital FPV Revolution – The DJI, Leadcore and Artosyn Love Triangle

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medialab.github.io 6mo ago

I Want Hue

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flow5.tech 6mo ago

Flow5 released to open source

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www.dpreview.com 7mo ago

Sony A7 V Review

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analogmiko.com 8mo ago

Reverse Engineering of Tektronix SD-24 20GHz Electronic TDR Sampling Head

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steve-p.org 8mo ago

Rider-Waite-Smith tarot cards

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ttchisholm.github.io 9mo ago

Designing a Low Latency 10G Ethernet Core (2023)

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learn.microsoft.com 11mo ago

Windows 7 God Mode

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store-usa.arduino.cc 12mo ago

Arduino Nano R4

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www.tinytransistors.net 1y ago

ADXL345 (2024)

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sarahrenaeclark.com 1y ago

Lightfastness Testing of Colored Pencils

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streetcat.wiki 1y ago

StreetCatWiki

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lea.hamradio.si 1y ago

Homemade GPS Receiver (1992)

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www.tudelft.nl 1y ago

Autonomous drone defeats human champions in racing first

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www.pencilofrays.com 1y ago

Types of optical systems in a lens designer's toolbox (2020)

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www.tudelft.nl 1y ago

Autonomous drone defeats human champions in racing first

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www.pencilofrays.com 1y ago

Types of optical systems in a lens designer's toolbox (2020)

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floooh.github.io 1y ago

Tiny Emulators

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hforsten.com 1y ago

Homemade polarimetric synthetic aperture radar drone

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pubpeer.com 1y ago

Comment on 2015 mRNA paper suggests data re-used in different contexts

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znah.net 1y ago

Gate-level simulation of ASIC in browser

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www.pa3fwm.nl 1y ago

PA3FWM's Software Defined Radio

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www.willwhang.dev 1y ago

Project IMU Array

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dmytroengineering.com 1y ago

Hacking the T2S+ Out of Fear: Get Lock-In Thermography for Free

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destevez.net 1y ago

Not-LoRa GRCon24 CTF Challenge

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Electrochemical pile style oxygen sensors continuously deplete themselves whether actively measured or not. Common smart home oxygen piles have a fixed lifetime of a few years, and they're quite sizable (probably about as much volume as a whole smartwatch). Putting the same chemistry in an even smaller package would likely result in lifetime measured in hours

Yes you provide a great example of binning and market separation. Though I think in this case there's some limiting factors that make it infeasible to bin these fancy Noctua fan rotors including: 1) tooling have limited lifetime and will get sloppier and worse yields as time goes on. It's inefficient to use precious cycles of a precise tool and die on producing lower grade parts. 2) the material itself is likely more expensive than what industrial/lower grade use cases require. Why use reject Noctua when you can get regular crappy plastic for 1/500th the cost? 3) I expect Noctua stuff to be a much lower volume than lower cost/quality vendors so the volume of Noctua rejects is likely too low for a company to dedicate a product line using it. 4) brand/marketing reasons

Another obvious use case of binning is for microchips where the same die can be "wounded" to create multiple product variants that target different market segments, and also yield improvement from being able to isolate and disable an area of the die that are defective. However improving the manufacturability and yield itself is still fundamentally important

Traditional Chinese relies on context: “Rain heavy, not go”, “雨大,不去了”.

Modern Chinese demands explicit logic: “Because the rain is heavy, therefore I will not go.””因为雨下得很大,所以我决定不去了。”

Interestingly the "traditional grammar" is much more conversational and natural, while the latter is expected for modern written work.

Probably true. Though as someone who can read both English and Chinese, I thought the translations in the article does a good job of representing the traditional vs modern grammar styles. Not sure what more explanation would be necessary

It seems like you largely agree with the article - people shall own nothing and be happy. Perhaps the artificially induced supply crunch could go on indefinitely.

Also, I wonder how many of us, even here on HN, have the ability to spend that amount of money on computer for personal use. Frankly I wouldn't even know what to do with all the RAM - should I just ramdisk every program I use and every digital thing I made in the last five years?

Anyhow, I suppose for the folks who can't afford hardware (perhaps by design), one ought to own nothing and be happy.

There are many things that are valuable to people, but which they would rather not pay for. They include public goods and externalities, like infrastructure and education and a reasonable amount of military. It makes a lot of sense that people would rather enjoy art for free if they had the option, and since the majority of art experience can be easily duplicated and transmitted, why pay for it yourself? There is also another benefit of art stimulating further intellectual and creative development of a society, perhaps yielding second order benefits that are hard to quantify. Thus overall, it can make a lot of sense for government to pay for art as a society.

Gpg.fail 7 months ago

So what toolbag or workshop of excellent specialized tools would provide the same capability as GnuPG?

It's because the phone design needs the battery to help stabilize the voltage under load. As we know, digital devices can nearly instantaneously change the amount of current they consume and thus require layers of energy storage to accommodate the transient currents quickly. However, the changing current consumption doesn't just happen briefly. It sometimes continues to ramp for more than milliseconds (a glacial time frame for modern electronics). Thus generally every component in the power supply network of a design serves some stabilization and filtering role, including the batteries.

It appears that in this case, as the original battery aged, its internal apparent resistance (ESR) increased beyond the original design expectations, to a point where the phone won't work when plugged in to a charging cable because despite the charging cable most likely being able to deliver sufficient power at DC, it had too much impedance to supply it quickly enough. When current is demanded from a source that has too high impedance to supply it, the voltage drops. This will result in significant voltage ripple to the power supply of the digital circuits, which can cause logic to not function correctly.

Adding a large capacitor basically replaced the filtering and stabilization role of the original battery.

Interestingly people often intentionally remove capacitors for side channel measurements and glitching attacks.

There are modular dot shaped led matrix blocks that are basically LEDs under a cast piece of resin that guides light. They're tillable and you can drive them with an FPGA and a smart shift register based constant current driver. They're generic so you can look around online.

For example: https://www.jameco.com/z/SBM-2388ASRG-RG-Super-Bright-8x8-Do...

However this is assuming your installation will be reasonably large. If it's too big, I recommend making your own array out of discrete LEDs. They sell LEDs with a built in milky diffuser that are suitable.

I have read the docs, and like I said the point of STM32 is ubiquity. It's not a great design in other respects but it was once ahead of the envelope and that made it ubiquitous which made it king for longevity. There is no room for another "king" on that throne. Especially counting all the clones of STM32, it is basically a forever design.

Comparing a 60 cent chip to a 10 cent chip is itself crazy work. That's like a whole three stratums apart in terms of capability. Dammingly, you are forgetting about the cost of the external flash that it requires, when program flash is the main cost of MCUs. It shows you don't have much experience with this stuff.

I see no mention of exact part number of inductor requirement in their hardware design guide, are you making shit up now?

LMFAO go read the literal datasheet page 455 https://datasheets.raspberrypi.com/rp2350/rp2350-datasheet.p...

They literally had to "work with Abracon to create a custom 2.0×1.6mm 3.3μH polarity marked inductor" like wtf

Besides how it looks like you weren't one of the early adopters (since RPi shipped one abracon inductor with every one RP2350 for a bit), you also clearly haven't designed a board with the chip in question.

theoretical maximum of 3.2 gigabytes per second bandwidth. That is pretty crazy.

This is what I'm talking about, like honestly what capability does that unlock for you beside party tricks? Can you name anything meaningful beside "logic analyzer" and "some memory card?" Even disregarding that, what can you do with such thruput if you are bottled by USB 1 speeds and a core without FPU? It doesn't come close to being able to do interesting things like LVDS ADCs or actual high speed memory interfaces because of the bit width requirement, yet people will go into a frothing frenzy should you dare insinuate that RPi Pico might be kinda useless

rp2040/rp2350 are unironically one of the best MCUs on the market (esp. in their niche), both in documentation/API and price/perf and features/flexibility in doing highspeed interfaces/bandwidth.

As you might surmise, I disagree. Go make some actual projects instead of "reading the docs" all day (though I must admit I do the same). Also, it sure looks like our definition of high speed differs by a wide margin

I'm referring to their collective effort in MCUs, including RP2040 and RP2350. There are a bunch of issues that are now addressed but permanently makes me distrustful of them especially when combined with how uninteresting the hardware are

- Broken ADC design on RP2040 with nonlinearity at certain codes (and they're not fixing it)

- Shipping chips with exact part number of inductor and specific DCDC layout requirement (like come on, the Chinese are advertising zero decoupling capacitor required and you can route the USB right under the chip in funky shapes and everything "just works".. meanwhile RPi is doing this)

- GPIO current leakage (fixed with a stepping but I would hate to be those who bought a reel of the earlier stepping)

"Actually good MCU products" in my opinion are those with at least a reason to exist. For example the ubiquity of STM32, the radios of ESP32, the high compute of i.MX RT1172, the cheapness of PY32 et al, the low power of Ambiq chips, the reliability of Atmel/Microchip, the USB3 on CH569, the potential true MCU-level-SoC-capability on AG32, etc. When compared with these, RP chips are frankly not innovative at all (PIO does not unlock much actual capabilities besides party tricks). Combined with the general culture of people hyping RPi Pico chips, it results in a culture of ignorance and hype.

Erratas alone aren't a big deal, but the fact that they're happening with such basic things and for no innovation is not a good sign. We shouldn't give RPi a pass just because "it's the good old RPi that we know"

I completely agree. I can't handle watching his videos for long, for similar reasons.

However besides the personal dislike, I think its worthwhile to stop giving so much merit based on advertising "open source" or "effort" or "presentation" etc, because frankly many of these YouTube "makers" and the "maker community" are misguiding a lot of people to make bad designs and waste time and resources. People ought to value correctness and quality a bit more, lest our things become even more enshittified than they are now. One would think that hobbies would be a refuge from disposable low quality shit... yet we get RPi Pico et al (which are arguably getting less shitty but still laughable compared to actually good MCU products) and the people who claim to "out do the big corp" by using a Raspberry Pi with an SDR dongle and saying they achieved $50000 of capability with $60 in parts..

Case in point, the Opulo PNP systems are significantly overpriced and have amateurish mechanical as well as circuit design that are worse than cheaper systems like Pandaplacer in terms of reliability and performance.

QFN packages would not benefit much from this (you cannot make much more than a basic breakout board, whose same purpose is better fulfilled with one of those SMD adapters from aliexpress)

And regarding high-speed digital buses... are we being genuine here? Just the fact that you cannot have meaningful design over ground return paths with this thing makes any moderately fast digital link unfeasible. Best you'll be able to manage is regular speed SPI (which also does not need a board like this), you can forget about RGMII, ULPI, LVDS, MIPI, SLVS-EC, or anything else for that matter.

I see your point but, they're really not selling much more than golf carts and drones. If they go all-out with selling their actual military hardware (which they have a large stockpile and production capacity of), it would be get much more difficult for Ukraine to keep up the balance without increasing support from the west.

It's really quite interesting to see China being labelled as imperialist mean while the western powers have been colonizing and meddling in all kinds of affairs for generations... (see Operation Northwoods as one example)

"Corporations," in this context, is just another way to say people.

No, I think its referring more to the systems that describe how the group of people behave. It is an important distinction.

Also, the idea that effective and lasting change requires significant personal sacrifice and enduring hardship is yet another thing that corporations and politicians would like you to believe. It's great for causing inaction through human nature. Its effectiveness can be seen in anti-riot measures like tear gas or less-certainly-lethal munitions, asking people the question of "do you believe enough to endure THIS?" It's a rhetorical question.

The coming update has trains and factories! The game is mainly about managing compounding growth with discrete losses (having more land and cities increases you population cap, and your population follows a logistic curve, so you want to reserve an amount of population to maintain growth, and it's programmed so that you want to use a discrete amount for attacking instead of a constant trickle)

A good strategy that works well for me is to prioritize moneymaking and win by cleaning up a nuclear wasteland. Some tips for that strategy aka trademaxxing:

* The fastest way to make money is to get lots of ports and ally with people near and far. Boats give you more gold depending on their distance traveled

* Set up turtled-in bases on islands and have warships patrolling near them to shoot down potential land invasions. This combined with your small land area will make it less appealing for the big countries to focus on you

* Once you have enough funds for a MIRV, maintain strategic deterrence by having multiple missile silos - so you can launch the MIRVs any time

* Continue to trademaxx and wait for the big countries to nuke each other into oblivion

* Once the time is right (and you have enough funds for multiple MIRVs), move in to clean up the nuclear wasteland. Get some cities but don't spend too much money. If another country starts attacking you at this point, you can MIRV them again. You are also much more resistant to MIRVs since your assets are in money instead of structures and can rebuild quickly

Yes, hard silicon will be another magnitude more performant than FPGAs and GPUs, but ASICs properly take on negative value when they're no longer profitable to mine with. (Note that efficiency won't be much better at the same process node. You can just pump more power through each ASIC die)

Edit - I misread your comment. ASIC designers will use FPGAs to test their design but it won't be optimized for FPGAs which have a different logic-and-memory characteristic than ASICs. There aren't many great SHA256 FPGA implementations, largely because there's not that much demand for one