I locked the thread because it included a link to what could be considered a web page to steal intellectual property, not out of any dislike of the poster or anger at the post.
Groups IO has some specific rules on IP theft and I felt it better to play it safe then sorry and get our group sanctioned.
?
As I've made clear several times I'm unsure of proper protocol when it comes to such acts and took a chance not to hide data from the IEEE but to protect our group.
Sort of "Better safe then sorry."
?
Like most professional organizations, the IEEE is extremely protective of their IP.
Try snagging copies of any if the UK, ANSI, or SAE publications and publishing them.
I suspect you will receive a "take down order" fairly fast.
?
I'm sorry if my actions offended you but such is life.
Feel free to join the various IEEE divisions so you can read all the papers I referenced.
?
I unlocked your thread for this explanation.
If you disagree with my actions, complain to the other mods and owners and perhaps they will strip me of my powers and perhaps even use the banhammer on me.
?
Oh, I didn't volunteer for this august position, I woke up one morning to learn I have some unasked for responsibilities.
?
As I wrote in the first post in this insane thread....
" The IEEE is like Disney, they are extremely protective of their intellectual property.
I took a chance and deleted a post that gave a link to bypass a paywall.
I believe it violates Groups IO terms of service.
I'd like for other mods and owners to confirm my action was proper."
?
I did not expect it to attract any attention other then questions or complaints about my decision.
I'll stand by my decision and delete each and every post that includes links to bypass intellectual property, until other mods/owners tell me to stop.
?
I unlocked your thread for this explanation.
If you disagree with my actions, complain to the other mods and owners and perhaps they will strip me of my powers and perhaps even use the banhammer on me.
?
?
?
?
|
Re: Sort of improvised work bench
I have a 1KVA 1:1 transformer under my bench wired to a single outlet through a Variac and dim bulb limiter (with a bypass switch). ?I use this for working on old tube radios with a hot chassis. ?The idea is to prevent grounding mishaps when hooking up test equipment. ?The outlet is fused and switched independently of the rest of the bench electrical, and carries no ground. ?I only use it for hot chassis stuff.
Incidentally, I started years ago with a small tabletop arrangement similar to what your article describes, and it quickly grew into a more traditional bench. ?Gotta start somewhere though.
Nelson Johnsrud Manitowoc WI Nelsjohnsrud@... Sent from Apple Mail mobile?
toggle quoted message
Show quoted text
On Nov 26, 2024, at 5:38?PM, wn4isx via groups.io <wn4isx@...> wrote:
?
One of the members of our shortwave club lives in a small condo where space is a premium.
He found this article and it works better then I'd have expected.
?
https://www.stufinnis.co.uk/workbench.html
?
The workbench fits on a kitchen table but could probably be used with similar tables. And forget common card tables, they are way too flimsy. I used one as my work bench when I was 12 and one afternoon a leg buckled and it was a mess. I was too busy dodging the hot soldering iron.
?
Obviously you have to change the British AC outlets for American ones if you are in America, other nations will require similar adjustments.
I'd add a 'ground fault interrupter' or "?"residual current device" at the workbench. A GFI has saved my rump several times.
?
Take the part on isolation transformer equaling added safety with a large hunk of salt.
?
Is An Isolation Transformer A Safety Measure Or Death Trap?
https://sound-au.com/articles/iso-xfmr.htm
?
And Variacs, variable AC power transformer, have some important issues.
https://sound-au.com/articles/variac.htm
Failure to place a fuse in the secondary of the Variac, a fuse in the hot/primary won't protect the secondary from an overload.
?
I use a super fast magnetic breaker in series with a conventional fuse in the secondary.
|
Sort of improvised work bench
One of the members of our shortwave club lives in a small condo where space is a premium.
He found this article and it works better then I'd have expected.
?
https://www.stufinnis.co.uk/workbench.html
?
The workbench fits on a kitchen table but could probably be used with similar tables. And forget common card tables, they are way too flimsy. I used one as my work bench when I was 12 and one afternoon a leg buckled and it was a mess. I was too busy dodging the hot soldering iron.
?
Obviously you have to change the British AC outlets for American ones if you are in America, other nations will require similar adjustments.
I'd add a 'ground fault interrupter' or "?"residual current device" at the workbench. A GFI has saved my rump several times.
?
Take the part on isolation transformer equaling added safety with a large hunk of salt.
?
Is An Isolation Transformer A Safety Measure Or Death Trap?
https://sound-au.com/articles/iso-xfmr.htm
?
And Variacs, variable AC power transformer, have some important issues.
https://sound-au.com/articles/variac.htm
Failure to place a fuse in the secondary of the Variac, a fuse in the hot/primary won't protect the secondary from an overload.
?
I use a super fast magnetic breaker in series with a conventional fuse in the secondary.
|
configuring VCO input signal so it will be sensitive in PLL system
/g/electronics101/photo/296358/3858957?p=Created%2C%2C%2C20%2C2%2C0%2C0
?
|
What list is this again? -- Aaron Turner My father once told me that respect for the truth comes close to being the basis for all morality. "Something cannot emerge from nothing," he said. This is profound thinking if you understand how unstable "the truth" can be. -- Frank Herbert, Dune On Tue, Nov 26, 2024 at 10:35?AM Mail via groups.io <Pfaff1222@...> wrote:
I would view the Covid death count with skepticism. There were even reports of Covid deaths for accident victims. Lots of unexpected deaths in the obits these days.
Expect the life expectancy to drop over the coming years.
How many deaths from flu on average per year?
On Nov 26, 2024, at 10:52 AM, Gooey via groups.io <gooeytarballs@...> wrote:
?
"About 440,000 people died in the USA in any given year from medical errors, that's over 1200 a day." One man's opinion - no source cited. (440,000/350,000000=0.0013 (Rounded up))
Life expectancy: 77.5 years
Infant Mortality rate: 5.60 deaths per 1,000 live births
More than 3 million persons died in the United States in 2023. The overall age-adjusted death rate in 2023 was 6.1% lower than in 2022. The overall death rate was highest among non-Hispanic Black or African American persons. The number of deaths from COVID-19 was 68.9% lower than in 2022. .
Data are for the U.S.
Number of deaths for leading causes of death
Heart disease: 702,880
Cancer: 608,371
Accidents (unintentional injuries): 227,039
COVID-19: 186,552
Stroke (cerebrovascular diseases): 165,393
Chronic lower respiratory diseases: 147,382
Alzheimer¡¯s disease: 120,122
Diabetes: 101,209
Nephritis, nephrotic syndrome, and nephrosis: 57,937
Chronic liver disease and cirrhosis: 54,803
Source: Mortality in the United States, 2022, data table for figure 4
--
G.T.
|
I would view the Covid death count with skepticism. There were even reports of Covid deaths for accident victims. Lots of unexpected deaths in the obits these days.
Expect the life expectancy to drop over the coming years.?
How many deaths from flu on ?average per year?
toggle quoted message
Show quoted text
On Nov 26, 2024, at 10:52 AM, Gooey via groups.io <gooeytarballs@...> wrote:
? "About 440,000 people died in the USA in any given year from medical errors, that's over 1200 a day." One man's opinion - no source cited. (440,000/350,000000=0.0013 (Rounded up))
- Life expectancy: 77.5 years
- Infant Mortality rate: 5.60 deaths per 1,000 live births
. Number of deaths for leading causes of death - Heart disease: 702,880
- Cancer: 608,371
- Accidents (unintentional injuries): 227,039
- COVID-19: 186,552
- Stroke (cerebrovascular diseases): 165,393
- Chronic lower respiratory diseases: 147,382
- Alzheimer¡¯s disease: 120,122
- Diabetes: 101,209
- Nephritis, nephrotic syndrome, and nephrosis: 57,937
- Chronic liver disease and cirrhosis: 54,803
Source:
|
That should read "right-click on the unrecognized disk"
If your Windows operating system does not see a drive, you
need to open ¡°Disk Management¡±, click on the unrecognized disk, and select ¡°New
Simple Volume¡±.
Been using hard drives ever since that first ST-225 (which I still have!) and have a couple of boxes of "ATA" drives,? along with an external drive interface that will hook up to those,? SATA,? laptop drives,? etc.? What I'm seeing is that when I hook a drive up to this interface (which has its own power brick and power interfacing cables) I can hear/feel the drive spinning up,? but that's about the extent of what I get.? The computer just doesn't seem to "see" the drive at all.
I can't tell if the drive is initialiizing properly or not.
What I'm wondering is what goes wrong on the electronics of these?? Before I go ahead and tear 'em apart for scrap.? Any ideas as to how I can proceed further with testing these?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
|
If your Windows operating system does not see a drive, you
need to open ¡°Disk Management¡±, click on the unrecognized disk, and select ¡°New
Simple Volume¡±.
Been using hard drives ever since that first ST-225 (which I still have!) and have a couple of boxes of "ATA" drives,? along with an external drive interface that will hook up to those,? SATA,? laptop drives,? etc.? What I'm seeing is that when I hook a drive up to this interface (which has its own power brick and power interfacing cables) I can hear/feel the drive spinning up,? but that's about the extent of what I get.? The computer just doesn't seem to "see" the drive at all.
I can't tell if the drive is initialiizing properly or not.
What I'm wondering is what goes wrong on the electronics of these?? Before I go ahead and tear 'em apart for scrap.? Any ideas as to how I can proceed further with testing these?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
|
Been using hard drives ever since that first ST-225 (which I still have!) and have a couple of boxes of "ATA" drives, along with an external drive interface that will hook up to those, SATA, laptop drives, etc. What I'm seeing is that when I hook a drive up to this interface (which has its own power brick and power interfacing cables) I can hear/feel the drive spinning up, but that's about the extent of what I get. The computer just doesn't seem to "see" the drive at all.
I can't tell if the drive is initialiizing properly or not.
What I'm wondering is what goes wrong on the electronics of these? Before I go ahead and tear 'em apart for scrap. Any ideas as to how I can proceed further with testing these?
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
|
"About 440,000 people died in the USA in any given year from medical errors, that's over 1200 a day." One man's opinion - no source cited. (440,000/350,000000=0.0013 (Rounded up))
- Life expectancy: 77.5 years
- Infant Mortality rate: 5.60 deaths per 1,000 live births
. Number of deaths for leading causes of death - Heart disease: 702,880
- Cancer: 608,371
- Accidents (unintentional injuries): 227,039
- COVID-19: 186,552
- Stroke (cerebrovascular diseases): 165,393
- Chronic lower respiratory diseases: 147,382
- Alzheimer¡¯s disease: 120,122
- Diabetes: 101,209
- Nephritis, nephrotic syndrome, and nephrosis: 57,937
- Chronic liver disease and cirrhosis: 54,803
Source:
|
Incredulous that this thread, ostensibly started to justify/explain the removal of a post deemed inappropriate continues without moderation with a prime participant the moderator first justifying the application of the posting rule(s).
"Post Deleted" indeed!
|
Re: TFX 18210 mixer used as frequency detector
On Tue, Nov 26, 2024 at 12:21 AM, john23 wrote:
Hello Tony,where is this document could you share a link ?
By "Tony", did you mean "Andy"?
?
Like I said, I googled "TFX-18210".? Then I scrolled down to this link:
?
?
Andy
?
|
Re: TFX 18210 mixer used as frequency detector
Hello Tony,where is this document could you share a link ?
Thanks.
?
in a document from Artisan
|
Re: Is There a Digital Audio Sinewave Generator That Uses Delta Modulation?
On Tue, Nov 26, 2024 at 02:19 AM, Bob Smith wrote:
BTW: is your code posted anywhere?
Sorry, I remember now that, 3 days ago, I attached my first code at a post I wrote in the eevblog forum:
https://www.eevblog.com/forum/projects/simple-sinewave-generator-with-arduino-(100hz-100khz)/msg5724993/#msg5724993
?
Since I didn't get any comment, I forgot about it.
?
|
Re: Is There a Digital Audio Sinewave Generator That Uses Delta Modulation?
On Tue, Nov 26, 2024 at 02:19 AM, Bob Smith wrote:
BTW: is your code posted anywhere?
I don't think it can exist now other than on my laptop :)
?
As you know, a delta bits stream is defined by 3 parameters:
[1] The frequency of the delta clock (say, Fclock).
[2] The number of delta bits in a cycle (say, Nbits).
[3] The delta step (say, Dstep).
?
Fclock depends on how fast the code loop is. I had to use the old MCU, ATmega32A. My code loop is 4 MCU cycles (2 MHz bit rate with an 8MHz crystal).
?
I started the Nbits from 96 bits and ended at 3088 bits. This produces the frequencies from 20833 Hz down to 647.67 Hz (the high band). By lowering 32 times the bit rate (62,500 Hz), the same delta bits streams of the high band produce the frequencies from 651.04 Hz down to 20.240 Hz (the low band). Each band has 485 frequencies: 970 frequencies total. The ratio of two consecutive frequencies is between 1.04% and 0.52%.?
?
The problem is to find the Dstep that generates the delta bits and satisfies a certain condition; like lowest THD for each frequency or constant amplitude for all frequencies, for example.?
?
Since I had no clear idea on how to let the MCU calculate the THD of a bit stream, I chose the second one which is rather easy to code.
So, my first basic code (sorry, I had to write all my codes, since many decades ago, in assembly language only, because of sanctions) generates a table (written on the MCU EEPROM, size 1024 bytes) of the 485 Dstep's (2 bytes each) which lets the generated amplitudes be close to a certain level.?
?
The second basic code uses the results (Dstep's table) from the first one to output a sinewave once it gets a frequency index [0 to 969].
To test the code, I decided to use 3 encoded BCD 10-state thumbwheels connected to 12 IO pins. I also added a push-button to break the wave loop in order to generate another frequency whose index is set already on the thumbwheels.
?
I guess it is clear that my project is more about advanced programming than electronics. I have always no problem to share my work with others (for instance, I personally have 'nothing' to hide in my entire life; intellectual and personal as well). It is up to the owner of the list, since I am just a guest, if discussing here this project in detail is a good idea or not.
?
Kerim
|
Re: Extraordinary claims require extraordinary proof
This doesn't look that great to me.? The alpha
gain is interesting but comes with some problems.
1] The alpha gain is only with a shorted output (very low
impedance), so the power gain is very low.
2]? A transistor has about the same input impedance (low forward
biased diode but variable depending on the base/emitter internal
resistance times the current gain) as the LED unless they're
colored light (not infared) that have higher voltage requirements
to light.
3] The big advantage of the transistor is that the output
impedance is very high relative to the input impedance.? I.e.,
it's more of a constant current device so now the power gain is
magnified by the current across a higher resistance load.? Solar
cells are limited to about 0.6V max voltage gain because they are
forward biased diodes that go into conduction if you try for more
voltage than that.? You're going from a low impedance input to a
low impedance output.
4]? They would be poor photoresistors because most photoresistors
are really resistors that vary in resistance, even with tens or
hundreds of volts across them that can be AC or DC.? Solar cells
will not perform nicely if trying to control AC voltages due to
being essentially large area diodes limiting the voltages to less
than about 1/2 volt AC.
Interesting idea for a thought experiment, but I don't see it
being particularly practical.
Regards,
Charles Patton
On 11/25/2024 4:11 PM, wn4isx via
groups.io wrote:
toggle quoted message
Show quoted text
Visit this site and look at the graphics
?
I've never tried using a solar cell as a photo resistor. I
think I'll sacrifice a PV array from a solar lawn light later
this week.
?
|
Re: IEEE retirement membership rates
You might try using this site.? Most pre and post published IEEE material gets submitted here.
Sam
|
Re: Is There a Digital Audio Sinewave Generator That Uses Delta Modulation?
On 11/25/24 09:32, Kerim via groups.io wrote: I used to call its project ¡®Delta Sinewave Synthesis, DSS.
But perhaps I was just re-inventing the wheel Well, yes, there are other DSS audio generators available in which the 'D' means direct. I've done some DSS work as well using an FPGA, and like you, was reinventing DSS generators. Still, it a lot of fun to think about the problem. Sometime a solution has applications in other projects. In my case it was the sine look-up table that I was able to reuse. Bob BTW: is your code posted anywhere?
|
On Sunday 24 November 2024 08:37:11 pm wn4isx via groups.io wrote: I'm more worried about medical malpractice then someone with a firearm. Which is why we try to really understand and participate in what we're dealing with. So far that's working out pretty well. And firearms? It really depends on who. I've seen people at some of the public ranges do some really stupid stuff. Or some 16 year old girl texting to a friend behind the wheel.
Or repeat drunk drivers....in January of 2023 my wife was driving, making a right turn and a woman tried to pass between us and the curb...on the right side... in about 3 feet of road and curb space.
She tried to claim my wife was turning left but multiple witnesses confirmed my wife was turning right with the proper turn signal flashing. When my brother got rear-ended once while waiting to make a left turn off a 2-lane, the cops that responded took the bulb remnants. I guess it's not too hard to determine if that bulb was lit. The cops were less then kind to her when she wanted to argue and started to attack my wife but Mr. Taser demonstrated a gazillion volts will take down a 300 pound psycho woman in an instant. Makes them twitch nicely too.
It gave me an entire new determination to never argue with the long arm of the law to avoid getting lit up. Many years back we were trying to help some guy out who ended up getting abusive after showing up drunk. Cops were called, and he got belligerent. One lady cop with a billy club adjusted his attitude rather quickly. The woman had a dozen priors but was well respected and managed to avoid serious problems.
Since we shared auto insurance companies, our insurance company cancelled her insurance, she got popped a month later for another DUI accident and the state finally acted. Ten years no chance of early release.
So unsad. My brother's house is situated on a rather long hill, and just a bit above the place is a curve, and people tend to drive down that hill too fast and lose it, ending up in his front yard. On one occasion there was some damage to the porch. Sometimes they take off after that. One guy they caught was driving on a suspended license. One gal was drunk, and jumped out of her car after ending up in the neighbor's driveway and ran out across the fields, barefoot. They eventually caught her, too. He's talking about some "landscaping" involving the use of some rather large boulders... In Lexington Kentucky the best way not to get shot is not to deal illegal drugs and to avoid open drug markets....
Yup, it's good to stay away from such stuff. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin
|
Re: Extraordinary claims require extraordinary proof
On Mon, Nov 25, 2024 at 02:18 PM, A6intruder@... wrote:
Any chance the paper was written by AI?...
Nope, I didn't write it.? Not me.
?
-- the other AI? (Andy I)
?
:-)
?
|
Nelson Johnsrud
Gooey