- 230 Posts
- 283 Comments
evenwichtOPto
Ask Electronics@discuss.tchncs.de•Lenovo USB-C PSU for laptops powers a Rasberry Pi, but cannot simply charge bicycle lights. WTF?English
2·9 days agoThey are actually headlights. The kind that strap to your head, which I happen to use for cycling. I suppose they were intended for joggers. I don’t know the makes but it’s two different manufactures, likely some cheap chinese stuff. One is an LED strip across the forehead with a side beam, 7 or so different functions with different colors and intensities. The other has selectable red, white, or yellow colors, blinking or solid.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•USB-C PSU is 9v *only*. Is that compliant? Did a PD-compliant charger fry my gear?English
1·9 days agokenwood cr-st90s. Not sure about the OEM charger since I don’t have it.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•USB-C PSU is 9v *only*. Is that compliant? Did a PD-compliant charger fry my gear?English
1·10 days agoThe seller had a few of these same radios, new in box, but all missing the chargers. My thought was either the seller sold them separately or the chargers were stolen and so whatever retail store had them could not sell them and they ended up on the street market. But after seeing that the OEM chargers are strictly 9v, they seem worthless without the radio. Unless it’s just a shitty label. Maybe the OEM charger is proper USB PD, but they only wrote 9v on the label. I can only speculate.
The universal charger I have could also be dodgy. It was from a 2nd-hand shop. But afaik it’s fine.
Since I don’t have the OEM charger, I cannot see how it is marked. I just recall it was only marked 9v.
(edit) it’s also possible that the OEM chargers are poor quality and have short lives… maybe the retailer opened boxes just to replace broken chargers for customers under warranty, which would also result in radios without chargers.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•USB-C PSU is 9v *only*. Is that compliant? Did a PD-compliant charger fry my gear?English
2·11 days agoDead battery was my 1st theory, but it’s questionable. I fiddled with a healthy demo unit (same model) at the store. The battery ran out of juice and the machine shut down. I plugged it in and hit the power button and it instantly turned on. So it can apparently run directly off the USB-C as the battery charges (and the manual says as much). But the one I have never powers on, even when connected to power.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•Lenovo USB-C PSU for laptops powers a Rasberry Pi, but cannot simply charge bicycle lights. WTF?English
21·11 days agovoltage = current × resistance, IIRC my high school physics correctly. If current is zero, then voltage must also be zero, no? I don’t understand how voltage can be positive if amperage is zero.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•Lenovo USB-C PSU for laptops powers a Rasberry Pi, but cannot simply charge bicycle lights. WTF?English
3·11 days agoIs the spec ambiguous on that then? Is a 5v default and a PSU without default both compliant?
evenwichtOPto
Ask Electronics@discuss.tchncs.de•USB-C PSU is 9v *only*. Is that compliant? Did a PD-compliant charger fry my gear?English
2·11 days agoUSB-C chargers won’t work in this case, as they only output voltage, if they detect a device.
Note that the first 2 times I attached a universal USB-C charger to the radio, it gave a charging animation (though after ~30-45 min wait). So I am struggling to work out how that happened. Did the charger give up after waiting a long time and say “fuck it, will give some arbitrary power”?
You need a USB-A charger with a A-to-C-cable.
My universal charger has both USB-A and USB-C ports. I tried the USB-C port first (thus usb-c→usb-c). Then at one point I tried usb-a→usb-c. I was expecting usb-A to behave the same because the charger specifies the same range of voltages for both ports. The only difference is the max current is a little higher on the usb-c.
evenwichtOPto
Ask Electronics@discuss.tchncs.de•Lenovo USB-C PSU for laptops powers a Rasberry Pi, but cannot simply charge bicycle lights. WTF?English
4·11 days agoWhat would be the meaning of a default voltage then? My understanding of USB PD is that 5v is a default, which I took to mean it would deliver 5v in the absence of a handshake.
well, I can just choose something that suits my tastes instead from the internet?
I have no Internet, because the war on cash means there is tolerance for ISPs to effectively (and unlawfully) refuse to serve unbanked people. Being offline makes other info sources much more important. Unbanked people can get Internet but it’s a much higher price because only prepaid GSM providers are willing to take cash.
(In practice, I would rather that we had more resilient mobile infrastructure, as more and more people have phones and can receive SMSs in an emergency; and more people getting into CB due to the possibility for bi-directional communication)
Is that possible? SMS is notoriously unreliable. Sometimes I receive an SMS a full day after it was sent. Sometimes I never receive an SMS that someone is absolutely certain they sent. The tech seems to be inherently unreliable. Radio pagers from the 1980s are reliable. So it was foolish to ditch radio pagers, IMO. I wish I could buy a radio pager and subscribe. Some emergency response operations (firefighting and ambulance services) were smart enough to continue using radio pagers, but this service is not offered to the general public.
Is there a technical requirement for the 3+ seconds of decoding before sound output? Or is this a matter of simply waiting for buffers to be filled before outputting?
It’s a limitation of physics. No computer takes zero time to execute instructions. I don’t know to what extent buffering contributes to that, but it does not matter. You can’t really have a situation where all receivers are in sync with their decoding times. The only possibility would be to choose an easily achievable timespan, then mandate that all players add a delay. But this is borderline crazy talk. WRT point #1: given no legal interference, it would be possible for a radio to have several tuners so when someone is channel surfing, it could theoretically anticipate the need to give them the next signal in chronological sequence, to give an FM-like tuning experience.
Your points about 1 and 7 really seem like a product issue more than a technology issue
They are solvable issues, apart from point 4 (and realistically point 6 as well). That does not excuse a nationwide oppressive mandate to cut off FM transmissions and render all FM radio receivers as needless e-waste.
Point 6 is not really the fault of DAB but instead of how the infrastructure is setup. FM transmitters could be source their data from the cloud too, and would be vulnerable to the same things.
I would like to see the physical size difference between a vacuum tubes FM tuner and a DAB tuner. I doubt anyone will be making tubes DAB radios, but if they did there is a heck of a lot more complexity due to the AAC digital compression which must be replicated in analog circuits.
evenwichtOPMtoUS Law (local/state/federal) ⚖•When the attorney general ignores your complaint
2·16 days agoA lawyer once told me there are a few left-leaning AGs who genuinely take the consumer protection role seriously. He named off a few states where he said you can expect decent treatment of compaints. Then he said a lot of AGs have no interest in the job at all. That they are just looking to climb the ladder and get a CV that enables them to run for governor. I think I have been quite unlucky with the states that are relevant to where I get burnt as a consumer. Though I don’t suppose that’s chance. The shittiest corporations are likely to select right-leaning anti-consumer states for their HQ.
I could not download the video. I must not be human enough.
(update) indeed it is downloadable… the option was a bit buried. All 934mb of it.
evenwichtOPtoIndividual🌡 Climate Action ✊@slrpnk.net•write a bot to drive airfare prices up -- for the environment, and to push back on airfare shenanigans
2·1 month agoGHG per passenger does not matter. It’s the net GHG that matters. If the plane is mostly empty, they will cancel the flight and shift people onto another flight.
evenwichtOPtoIndividual🌡 Climate Action ✊@slrpnk.net•write a bot to drive airfare prices up -- for the environment, and to push back on airfare shenanigans
21·1 month agoStupid you. That’s not how economics works. If a more expensive seat boosts airline profits, then they would simply already increase prices to begin with. They don’t need our permission. They can charge $1 million for a seat, if they want. But they will have a hard time selling the seat if it’s not going beyond the atmosphere.
Bit of econ 101 for you: If McDonalds spontaneously doubles the cost of a big mac out of the pure blue, they will more than double their profit on each burger. But they will sell substantially fewer, causing profits to drop. The market determines what price is optimum for profit.
I don’t consider successors to necessarily obsolete their predecessor. People still use and appreciate vinyl records despite having several successors (including magnetic tape which eventually lost ground to vinyl in the end, amid digital successors).
evenwichtOPto
Is this Instance Down?@infosec.pub•slrpnk.net: ~~“502 bad gateway”~~ now non-responsive (update 2: back up after 3 days)English
2·1 month agoThe story:
https://slrpnk.net/post/34202438
A commenter wrote:
“Just as stubbing your toe serves to remind you that you are real and alive, days-long server outages remind us that we are bare metal and not on a government-compromised cloud.”
Indeed!
evenwichtOPMtoUS Law (local/state/federal) ⚖•Can Americans demand a new SSN, now that the whole social security database was exfiltrated by Elon (via DOGE) and leaked to Cloudflare + an adocacy group seeking to overturn election results?
2·1 month agoHave you never heard SSNs called slave surveillance numbers? It’s the same thing. They are synonyms – borne from the fact that what was originally simply intended as a primary key in the DB of one gov administration became a global identifier ripe for abuse.
evenwichttoPersonal Finance 💸@sopuli.xyz•Americans should close all their bank accounts & open new accts, thanks to Elon who exfiltrated the entire social security DB & leaked it to CloudflareEnglish
2·1 month agoThe US does not even allow databreach victims to become informed of who handled their data prior to the breach:
evenwichtto
cybersecurity@infosec.pub•All US Social Security numbers may need to be changed following a massive breach that is already being investigated as a national threat
1·1 month agoBetter headline / TL;DR:
🇺🇸 Entire US social security DB¹ was exfiltrated by Elon’s DOGE and leaked to Cloudflare². (¹ SSN, name, home address, medical+bank+credit card info, tax details, work histories,…; ² corp that already sees ~⅓ of all your web traffic)
Interesting extracts here.
Moderates
- US Law (local/state/federal) ⚖
Text-Based User Interfaces (TUI; CLI) 💻🖮
- Open Data 📖📡
- Smartphone Required 📱(digital exclusion of people without smartphones)
- Email Required (digital exclusion of people without email) 📧
- Collection of stories about useful scraper robots 🤖
- E-mail providers and tools (for ad surveillance rebels/resistors) 📧
- Digital Fiefdom (aka walled-garden) Required 🏰
- Boycotts✊📣
- Public resource but access restricted 🚫 and ⛔ exclusive
- CAPTCHA required
- Am I Alone?






I harvested the CTAN DB to research this. The results:
1390 github.com 90 gitlab.com 36 sourceforge.net 31 codeberg.org 20 tug.org 18 framagit.org 16 bitbucket.org 10 git.gnu.org.ua 8 gitlab.gutenberg-asso.fr 8 gitee.com 6 dickimaw-books.com 5 puszcza.gnu.org.ua 5 heptapod.host 3 git.robertalessi.net 3 git.framasoft.org 2 lists.tug.org 2 git.sr.ht 2 gitlab.ti.bfh.ch 2 gitlab.inria.fr 2 gitlab.adullact.net 2 gitea.com 1 uds-datalab.github.io 1 tufte-latex.github.io 1 todo.sr.ht 1 texnia.com 1 svn.tuxfamily.org 1 svn.gnu.org.ua 1 svn.code.sf.net 1 svenharder.github.io 1 savannah.nongnu.org 1 savannah.gnu.org 1 repo.or.cz 1 qa.parsilatex.com 1 plmlab.math.cnrs.fr 1 osda.ws 1 latex-project.org 1 humenda.github.io 1 guitex.org 1 git.umaneti.net 1 git.savannah.nongnu.org 1 git.savannah.gnu.org 1 git.ortolo.eu 1 git.linta.de 1 gitlab.science.ru.nl 1 gitlab.reutlingen-university.de 1 gitlab.git.nrw 1 gitlab.fi.muni.cz 1 forge.apps.education.fr 1 bastien-dumont.onmypc.net 1 archiv.dante.deThe 3 most common forges for LaTeX projects are shitty centralised walled-gardens (MS Github, Gitlab, & Sourceforge). Only 174 projects out of 1690 are using open access free-world/decentralised forges (~10%).
It is disturbing indeed. It also means reporting bugs on ~90% of LaTeX pkgs requires dancing with an evil gatekeeper, licking boots, etc.