HNHacker News
TopNewBestAskShowJobs

rpaddock

476 karma · joined January 8, 2021

submissionscomments
rpaddock··on FCC seek comments on NextNav petition for rulemaking on lower 900MHz ISM band
Seems like NextNav is following the The Firangi Rules of Acquisition to Profit at the expense of every existing service in the 902 to 907 MHz band.
rpaddock··on Scientists discover a cause of lupus, possible way to reverse it
Yes. Also "inflammation and pain in the joints" can be mistaken for Rheumatoid Arthritis (RA).

We discovered the hard-way that my late wife had issues with this. Multiple doctors diagnosed her with both RA and Lupus. When we got the Nightshades out of her diet and switched to more natural based cleaning products, such as Hemp based soap, shampoo and vinegar for cleaning, her symptoms of RA and Lupus went away. An good allergist finds things like this.

rpaddock··on Sunstone
Showing an obvious bias my first thought was "Why is Sunstone Circuits on HN?".

They make printed circuit bards (PCBs) and have their own layout free software PCB123, which I've not used. If you are into PCB layout their blog is worth following for layout tips. I have bought boards from them and had no issues.

https://www.sunstone.com

rpaddock··on Scientists discover a cause of lupus, possible way to reverse it
The Nightshade family of plants, which are very common in our diets, can mimic the symptoms of Lupus. That food sensitivity needs ruled out when diagnosing the cause of Lupus.
rpaddock··on Inside a $1 radar motion sensor
The site Microwave News keeps up on the latest health aspects of such things.

https://www.microwavenews.com

rpaddock··on Generative AI Can't Cite Its Sources
I asked ChatGPT when a book was published and it said 2005. I knew the book was older than that and found it was actually published in 1981.

Probably can't cite a source for information that it created and was wrong in a lot of cases.

rpaddock··on Tell HN: Meta suspended my FB account because of a bug
I've had no issues with FB even with 2FA enabled. IG is a different matter.

IG suspended my account for violations of ToS for my posts. The problem here is I don't post on IG. I just used the account because sometimes you are forced to find stuff there, that is no place else. I logged into to look at something then was told of my supposed transgressions, without being told what they were exactly (FB has the same fluid Community Standards where they don't tell you what rule you broke and logged me out).

IG gave me 90 days to appeal.

The problem is I had 2FA on IG using Texting (not my choice that is all they had when I set up the account) and they never actually sent any texts to allow me to login to appeal. Which I could not do. They permanently suspended the account at the 90 day mark.

I've seen many other people complaining that IG 2FA doesn't work. No one at IG/Meta cares.

rpaddock··on Two ways to use an LED as a light sensor with Arduino
Yes. We both posted that he originated the idea at the same time.
rpaddock··on Two ways to use an LED as a light sensor with Arduino
Internet Search has become near useless of late, regardless of which Search Engine is used.

Hopefully you find it and let us know.

Forrest Mims was the first to propose using the LED as a sensor in the early 70s, not long after LEDs became common.

https://hackaday.com/2015/10/13/citizenscience/

rpaddock··on Two ways to use an LED as a light sensor with Arduino
Similar things have been around for a while and there are several variations to be found for the AVR, using the I/O pins rather than the ADC.

See US Patent 6,870,148 B2 March 22 2005 "LED WITH CONTROLED CAPACITIVE DISCHARGE FOR PHOTO SENSING" by Mitsubishi Electric Research Lab (MERL). https://image-ppubs.uspto.gov/dirsearch-public/print/downloa...

Also:

Dietz, P.H., Yerazunis, W.S., Leigh, D.L., "Very Low-Cost Sensing and Communication Using Bidirectional LEDs", ACM International Conference on Ubiquitous Computing (UbiComp), October 2003. BibTeX TR2003-35 - https://www.merl.com/publications/TR2003-35

Which is good for ~30 Baud and distances of inches at best.

https://people.ece.cornell.edu/land/courses/ece4760/FinalPro...

https://forum.chibios.org/viewtopic.php?t=2179

rpaddock··on Facebook will soon use your photos, posts and other info to train its AI
EMails related to 2FA and account recovery never arrive either from Instagram.

Instagram locked by account for posts that I didn't make (I don't post on IG, nor did anyone else post on my account) and gave me 90 days to appeal the decision. As I had 2FA turned on every recovery method involved an EMail (not my idea). So I could not appeal and they locked my account forever. To me not a great loss.

rpaddock··on Doctor at Cigna said bosses pressured her to review patients' cases too quickly
Something I wrote about the ICD10 coding system many years ago. These are real billing codes:

It is possible to arraigned the codes in rather amusing orders such as:

I required a Face Transplant, from a Cadaver; “0WY20Z0 Transplantation of Face, Allogeneic, Open Approach Transplantation of Face, Allogeneic, Open Approach” after my many spacecraft crashes into the ocean; “V9541XD Spacecraft crash injuring occupant, subsequent encounter”.

Sadly the first Face Transplant failed so one was grown in a lab for the second Face Transplant; “0WY20Z1 Transplantation of Face, Syngeneic, Open Approach Transplantation of Face, Syngeneic, Open Approach”.

Alas all of this made my “F52 Sexual dysfunction not due to a substance or known physiological condition” became so bad that I tried to harm myself with a jellyfish; “T63622A Toxic effect of contact with other jellyfish, intentional self-harm, initial encounter”. -- Amusement with the Medicare ICD10 Billing Codes –

rpaddock··on Z80 Product Line Z84C00 End of Life / Last Time Buy [pdf]
The Z80 clock input could bit the unwary due to its non-TTL level thresholds.

Look at the schematic for the TRS-80 on how they handled the drive.

rpaddock··on What is DECT-2020 New Radio (NR), and how big a deal is it? (2021)
I have a couple of these in hand. What they don't tell you there is you need to sign an NDA to get the most modern DECT versions of the software, because "it is still in development". I'm waiting for that signature now.

Also you have to dig through the data sheet to find out that the GNSS only works with LTE. If you want to use DECT GNSS can't be used, because it is part of LTE. Can't do both DECT and LTE at the same time.

rpaddock··on Dr. Dobb's Journal – Vol 1 (1976)
The review on that page points to 14 more volumes indexed here, just in case you missed that:

http://6502.org/documents/publications/dr_dobbs_journal/

rpaddock··on The lumbar puncture that changed my life
Thank You.
rpaddock··on Intel Rebrands Its FPGA Business Altera in an Awesome Branding Move
I hope these new Altera parts are more reliable than the original ones. The original EP300 was sensitive to power supply rise times and one time in a 1000 would come up brain dead (counted after several field complaints). Hence the EP310 and never any more Altera designs for us.
rpaddock··on The lumbar puncture that changed my life
Thank you.

Make sure the puncture location is well documented. That is a large part of the battel.

rpaddock··on The lumbar puncture that changed my life
"She added me to a private CSF leak group on Facebook with several thousand leak patients from around the world."

My late wife joined that group when it was 800 people in ~2011. Today we are closing in on 9,000 people. Back in the beginning a few people though that my late wife Karen started that group. She didn't. She was just a prolific poster there helping a lot of people as she learned about Leaks in her medical studies.

Part of Karen's saga, and mine, is published on the CSF Leak Foundation website here "When Pain is Relentless" :

https://spinalcsfleak.org/when-pain-is-relentless/

A few years later Karen's saga also became part of the documentary Pain Warriors. Which can be watched for free on Amazon Prime, TubiTV and Youtube. It is also on iTunes. Our goal is to raise awareness of CSF Leaks and the devastation they cause to families like mine. Karen took her own life due to the pain from CSF Leaks and being poisoned by the flourquinilone antibiotic Levaquin (NEVER Take that or Cipro et.al. which I can back up with FDA data, I want to focus on Leaks here).

The top doc in the world Dr Schievink [1] has estimated that just under 100% of people that have CSF Leaks have some type of under lying Connective Tissue Disease. Karen saw him and the docs that are mentioned in the parent article that were there at the time in the 2011-2013 time frame.

I had Karen's spin exhumed and it was sent to Duke to be studied. Much was learned from it to help those that came later. Sadly not nearly enough. All of this is documented in what has become known as Karen's Journal. Free to read on Karen's website. Any profit from the sale of physical books go directly to the Spinal Leak Foundation. [2] I also get nothing from the Pain Warriors Documentary. [3]

1:

https://spinalcsfleak.org/schievink-surgical-history/

2: Sadly the certificate expired so please ignore the scary warning until I get that fixed. I also need to fix a link that I see is broken to the PDF that was used in the documentary. http://www.kpaddock.com/book

3: Pain Warriors on YouTube:

https://youtu.be/WB60ZCiYwgk?si=PAVsDOVDcEdoJ-jC

Just typing this has me crying yet again.

What we desperately need is better imaging technology. When it comes to finding Leaks with today's methods we are still in the Stone Knives and Bearskin era.

CSFluid is almost identical to water making it hard to differentiate unless the leak is large. It does not take a large leek to cause devastating headaches.

If you have any ideas, please speak up.

rpaddock··on Facial recognition error message on vending machine sparks concern at university
In 2018 Renesas had a "Facial Expression Kit Giveaway" contest and I was one of the winners. It was the "RZ Omron Facial Expression Kit giveaway". RZ being one of their newer, at the time, Micro lines. I had to sign an affidavit to get my prize, which I did. Never did use it and it eventually went to a local Hamfest. Their example code was a vending machine.

This is the only related item I could find today:

"OMRON Develops Real-Time Facial Expression Estimation Technology"

https://www.omron.com/media/press/2012/10/e1023.html

rpaddock··on Men and women's brains do work differently, scientists discover for first time
First time? This work was published in 2013:

"... Men and women's brains are connected in different ways which may explain why the sexes excel at certain tasks, say researchers. A US team at the University of Pennsylvania scanned the brains of nearly 1,000 men, women, boys and girls and found striking differences.

Male brains appeared to be wired front to back, with few connections bridging the two hemispheres. In females, the pathways criss-crossed between left and right. …"

https://www.pnas.org/doi/abs/10.1073/pnas.1316909110

rpaddock··on USB-C power for your Amiga 500, 600 and 1200
Invest in a STM32G0 Discovery Kit for about $60. It tells you exactly what your USB-C power cube is capable of putting out.

So far I've only found one 35W Samsung cube that meet the spec of putting out 3.1V to 21V.

Most only put out one or two of the voltages of 9V, 12V, 15V or 21V. The 15W and under are usual 9V or 12V, with one being 15V. All will always default to 5V.

https://www.st.com/content/ccc/resource/technical/document/d...

rpaddock··on US agencies warn companies: Don’t delete Slack or Signal chats
"...at a macro level, the outcome 'companies legally delete all written communications as soon as feasible' seems baffling."

That leads us to directly to "2028 – A Dystopian Story" By Jack Ganssle:

http://www.ganssle.com/articles/2028adystopianstory.htm

That explains why no records are to be kept, and this is the real law:

Known as ’The Rule of 26’, which is sometimes given as a reason NOT to keep engineering notebooks etc. By Federal Rule 26 you are guilty if you did not volunteer the records before they are requested. Including any backups.

From Cornel Law:

LII Federal Rules of Civil Procedure Rule 26. Duty to Disclose; General Provisions Governing Discovery

Rule 26. Duty to Disclose; General Provisions Governing Discovery

(a) Required Disclosures.

(1) Initial Disclosure.

(A) In General. Except as exempted by Rule 26(a)(1)(B) or as otherwise stipulated or ordered by the court, a party must, without awaiting a discovery request, provide to the other parties:

(i) the name and, if known, the address and telephone number of each individual likely to have discoverable information—along with the subjects of that information—that the disclosing party may use to support its claims or defenses, unless the use would be solely for impeachment;

(ii) a copy—or a description by category and location—of all documents, electronically stored information, and tangible things that the disclosing party has in its possession, custody, or control and may use to support its claims or defenses, unless the use would be solely for impeachment; …

https://www.law.cornell.edu/rules/frcp/rule_26

rpaddock··on Researchers trace a form of lupus back to a single mutation
Food sensitivities to Nightshade vegetables include potatoes, tomatoes, peppers and several others can mimic the symptoms of both Lupus and Rheumatoid Arthritis in sensitive individuals.

When my late wife got those out of our diets, her symptoms of both Lupus and Rheumatoid Arthritis went away. This was after years of dealing with the Medical Establishment to treat the conditions with little results.

rpaddock··on 'Long flu' has emerged as a consequence similar to long Covid
In many cases the symptoms match those of Fluoroquinolone Toxicity.

Clueless doctors given this class of medication when it is not appropriate. This class really should be removed from the market. Even the FDA says not to use it unless there is no other option, yet the doctors keep giving it out like candy. Mostly for things that it doesn't work for like UTIs.

Ciprofloxacin (Cipro) Levofloxacin (Levaquin) Moxifloxacin (Avelox) and 25 other names world wide.

https://www.goodrx.com/classes/quinolone-antibiotics/fluoroq...

rpaddock··on Sliding Doors: The Time GM Fumbled Its Chance to Launch the First Minivan
I was specific, the Van Plant was razed. In the 1970s. My uncles lost their job because of it. I was present during some rather heated discussions when they came home. The Van Plant was a sperate building.

Clearly the rest of the Lordstown Assembly building is there for everyone to see driving on Interstate 80/Ohio Turnpike, which I do frequently.

I don't know what Wiki you are quoting but it is out of date. The plant structure was most recently part of Foxcon, clearly seen on the sign when driving by the building. The recent bankruptcy of Loardtowwn Motors and them suing Foxcon will lead to a sign change once again.

Loardstown Motors was frequently in the local news here mostly for not getting things done (to be polite).

rpaddock··on Sliding Doors: The Time GM Fumbled Its Chance to Launch the First Minivan
The GM Van Plant was in Loardstown Ohio.

The Union won some concessions, I don't recall what (I was young, my two Uncles worked there).

To send the Union a message the Van Plant was razed over a long 4th of July holiday. When Union members returned to their jobs after the holiday they found they had none, the Van Plant no longer existed.

GM corporation really needs to be razed itself once you look into such things.

rpaddock··on Everything We Know About 1970s Mainframe RPGs We Can No Longer Play
I wonder what Dave might have in his Large Scale Systems Museum (LSSM) along these lines?

Their website:

https://www.mact.io

My visit there in 2016:

https://www.bpaddock.com/doku.php/lssm/start

rpaddock··on DigiSpark (ATTiny85) – Arduino, C, Rust, build systems
To be pedantic _delay_ms() takes a double not an int.

In AVR_GCC versions before __builtin_avr_delay_cycles was available, in the compiler, if compiled with the Small Model (-Os) passing an int instead of a float ie: _dealy_ms(500.0f) would produce unexpected delays. This was a frequent source of bug reports in the early days of avr-libc. Those older versions relied on odd compile time coercions, and got confused if not passed a float.

I just wanted to mention that in case anyone has old versions of GCC laying around.

rpaddock··on Ways to break your systems code using volatile (2010)
I can add a bit of historical context here. John wrote that during the development of WINAVR, the first GCC compiler for AVR. The discussions can be found in the AVR-GCC mailing list archives.

When the 'Small' optimization is used in AVR GCC it is aggressive and leads often to broken code if 'volatile' is not properly used.

AVR GCC, using Small optimization, would remove any variable that has no side effects from the compiler's view. Setting a value in an interrupt handler would be outside of the view of the compiler's abstract machine, so 'flag' variables were often removed. Changes in hardware registers fall into the same category. These removals result in broken code.

Volatile is never a replacement for atomics or proper locks/mutexes/semaphores. If hardware such as an interrupt handler or hardware register is not involved, then using volatile is a creating a race condition, which may or may not ever become apparent.

Erich Styger wrote more recently about volatile here.

https://mcuoneclipse.com/2021/10/12/spilling-the-beans-volat...

John and I both make an appearance in the linked parent particle to that one.

Any earlier one of Erich's:

https://mcuoneclipse.com/2013/08/14/volatile-can-be-harmful/

If changing the optimization level breaks something, it is probably a missing volatile when doing bare hardware.

← PreviousPage 3 of 7Next →