Aceticon

joined 2 months ago
[–] Aceticon@lemmy.dbzer0.com 4 points 1 month ago* (last edited 1 month ago)

Whilst I agree with you in everthing but the first 2 words of your post, I think this is yet another "look at this cool gadget" post that overhypes something, and that is a kind of spam we get a bit of around here, even if nowhere near the levels of the Elon crap or even just US politics.

This is especially frustratingfor people who, like me, looked at the diagram they link from their article and found out it's pretty much the same as a run of the mill breadboard power adaptor with a USB-C connector and a slightly better design than the cheap chinese ones, rather than something trully supporting USB-PD (this thing doesn't even support the basic USB 1.0 negotiation needed to get more than 150mA when connecting to a proper USB host).

That the article then mentions a "crowdfunding campaign" for something that a junior EE can design with a bit of datasheet digging, carries a bit of a stink of a cash-grab, so seeing it as spam is understandable.

[–] Aceticon@lemmy.dbzer0.com 5 points 1 month ago* (last edited 1 month ago) (2 children)

If you look at the circuit diagram in their documentation linked from that article, that thing doesn't even support USB-PD or even just the USB 1.0 device side of the negotiation to increase the current limit from the default (150mA in USB 3) to high (900mA in USB 3). It will look like it works fine if you connect it to a dumb USB power supply (because those thing don't really do any USB protocol stuff, just dumbly supply power over USB connectors up to the power source's limit) but if you connect it to, say, a PC USB port (which does implement the USB host side of the USB protocol), your circuit on the breadboard that worked fine when using a dumb USB power supply with that breadboard adaptor might not work because the current it needs exceeds that default 150mA limit for devices that haven't done USB negotiation (worse if it's a USB 2.0 port, as the limit is lower for those)

This thing is basically the same as the chinese power breadboard adaptors you can get in places like Aliexpress, but with a USB-C connector instead of a Type-A, micro-USB or mini-USB one, plus its better designed (it has a proper Buck Converter instead of a cheap Votage Regulator, plus better power supply filtering and a polyfuse to protect it and the host from current overdraws).

The headline and the article seriously exagerate this "achievement".

[–] Aceticon@lemmy.dbzer0.com 19 points 1 month ago* (last edited 1 month ago)

TL;DR - It's a nice and pretty run of the mill breadboard power adaptor which happens to support USB-C connectors, but the article and its title insanely oversell the thing.

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This is not exact as amazing an achievement as the headline implies since the necessary stuff to talk the to the USB PD host upstream is already integrated so you just need to get a chip that does it (and even without it, you'll get 150mA @ 5V by default out of the USB 3 host upstream and up to 900mA with some pretty basic USB negotiation in a protocol that dates from USB 1.0 and for which there have long been integrated solutions for both the device and the host sides).

Further, the converting of those 5V to 3.3V just requires a buck converter or even just a voltage regulator (though this latter option is less efficient), for which there are already lots of integrated solutions available for peanuts and where the entire circuit block needed to support them is detailed in the datasheet for that converter.

Looking at the circuit diagram for this (linked to from the article), they're not even doing the USB PD negotiation or any kind of USB 1.0 negotiation, so this thing will be limited to 150mA for a USB 3 host or whatever current your traditional USB power source can supply (as those power sources really just do power supply of whatever amperage they support over a cable which happen to have USB connectors, rather than including a genuine implementation of an USB host with current limiting depending on negotiation with the USB device, so such power sources don't require the device to do any USB negotiation to increase the current limit above 150mA).

This is really "yet another run of the mill USB power breadboard adaptor" only the USB plug is USB-C rather than mini-USB or micro-USB (so, a different plug plus a handfull of minor components as per the standard of the circuitry to properly support it), so pretty much the same as the cheap chinese ones you can get from Aliexpress, though this one uses a Buck Converter rather than the $0.1 Voltage Regulator in most of the chinese boards, and actually does proper filtering of power supply noise and proper protection against over current, so it is a quality design for such things, though it's not really a major advancement.

Without the USB PD stuff I wouldn't really say that it brings USB-C Power to the breadboard (in the sense of, as many would expect, being able to draw a proper amount of power from a modern USB 3.0 power brick that supports USB-C), more something with a USB-C connector that brings power to the motherboard, as that connector is really the total sum of what it supports from the modern USB spec.

What would really be nice would be something that does talk USB-PD to the upstream host AND can convert down from the 20V at which it supplies peak power, so that you can take advantage of the juicy, juicy (oh so juicy!) capability of USB-PD to supply power (up to 100W right now, which will be up to 250W with USB 4), though if you're pulling 100W (which at 5V means 20A, which is a stupidly high current that will melt most components in a typical digital circuit) from you breadboard power adaptor, then I'm pretty sure magic smoke is being released from at least one of the components on that breadboard and, by the way, you're probably damaging the power rail of that breadboard (aah, the sweet smell of burnt plastic when you turn the power on for your half-arsed experimental circuit!!!)

[–] Aceticon@lemmy.dbzer0.com 22 points 1 month ago* (last edited 1 month ago)

Worry not: in 20 years' time people born in 2028 will all pretty much look like kids to you.

[–] Aceticon@lemmy.dbzer0.com 8 points 1 month ago (1 children)

I have a cheap N100 mini-PC with Lubuntu on it with Kodi alongside a wireless remote as my TV box, and use my TV as a dumb screen.

Mind you, you can do it even more easily with LibreELEC instead of Lubuntu and more cheaply with one of its supported cheap SBCs plus a box instead of a mini PC.

That said, even the simplest solution is beyond the ability of most people to set up, and once you go up to the next level of easiness to setup - a dedicated Android TV Box - you're hit with enshittification (at the very least preconfigured apps like Netflix with matching buttons in your remote) even if you avoid big brands.

Things are really bad nowadays unless you're a well informed tech expert with the patience to dive into those things when you're home.

[–] Aceticon@lemmy.dbzer0.com 2 points 1 month ago (1 children)

Ah, right - I misunderstood that point you were making.

So, as it turns out, we've been in agreement all along.

[–] Aceticon@lemmy.dbzer0.com 3 points 1 month ago* (last edited 1 month ago)

Whilst quite a lot of words are pretty much the same in both languages, "wie" in Dutch means "who" whilst in German it means "how".

Having learned Dutch first, I can tell you that when I was first learning German the expression "Wie geht's" tended to give me a serious mental hiccup when I was trying to talk to German people.

[–] Aceticon@lemmy.dbzer0.com 2 points 1 month ago* (last edited 1 month ago)

Not living in the US, I'm not up to date with US salaries.

That said, even for administrative personnel paid $25/h, $25 will pay 1h of somebody's work which is way beyond what is needed to close a retail customer account in any modern administrative system were such thing is a common operation which should take less than a minute to do, because people who design the kind of company administrative computer systems (such as yours truly, at least during part of my career) will make the most common business operations be the fastest to do in that system.

[–] Aceticon@lemmy.dbzer0.com 4 points 1 month ago* (last edited 1 month ago)

It deceives people whose idea of how things work in large companies hasn't changed since the days when it was the manager of your bank branch who decided if you you should get a loan or not.

Nowadays, for certain in middle and large size companies, all the administrative main business pathways are heavilly if not totally automated and it's customer support that ends up eating the most manpower (which is why there has been so much of a push for automated phone and chat support systems, of late using AI).

Those $25 bucks for "account closure" pays at worst for a few minutes of somebody's seeking the account from user information on a computer, cross checking that the user information matches and then clicking a button that says "Close accout" and then "Ok" on the confirmation box and the remaining 99% or so left after paying for that cost are pure profit.

[–] Aceticon@lemmy.dbzer0.com 5 points 1 month ago* (last edited 1 month ago) (5 children)

As somebody who works in designing software systems, including for large companies, lets just say that the amount of human time that goes into a customer account closure is negligible because main business operations such as openning and closing customer accounts are the ones that get automated the soonest and the furthest.

The stuff that uses "lots" (in relative terms) of manpower is supporting customers with really unusual problems involving third parties and even then spending 2.5 h man/hours (assuming the administrative person get paid $10/per hour) is pretty uncommon.

You've been lied to, repeatadly, for at least 3 decades.

[–] Aceticon@lemmy.dbzer0.com 4 points 1 month ago* (last edited 1 month ago)

In my personal experience, "the really old colleague" is often a real throw of the dice between stubborn-as-fuck-never-matured-know-it-all and very-interesting-seen-it-all-genuinelly-mature-colleague - so basically opposite ends of the scale. Often there's also the corner-guy-just-counting-their-days-till-retirement, which doesn't say much about that person since they're not really into establishing relationships with people whom they will soon never see again and just keep a low profile.

If you're early career, having one of the seen-it-all kind of older colleagues is probably one of the best things it can happen to you, especially if you're a bright kid.

[–] Aceticon@lemmy.dbzer0.com 4 points 1 month ago* (last edited 1 month ago)

The subtle just under the surface love-hate passive-aggressive interplay between Dayzie and Brice (if you're lucky, culminating in some kind of passionate-beyond-their-control office affair between them) would make that pair the most interesting to have as colleagues in the long run, IMHO.

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