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)
?
:-)
?
|
Re: TFX 18210 mixer used as frequency detector
The original Avantel is gone.? The current Avantel () is not related.
?
Wikipedia says Axtel acquired Avantel.? Try contacting Axtel, at or .
?
Google found a little bit of data about the TFX-18210, in a document from Artisan ().? I think it suggests that they (Artisan) make a functional equivalent to the TFX-18210.? If so, you might look to Artisan for more specifications.
?
Andy
?
?
|
Re: IEEE retirement membership rates
On Mon, Nov 25, 2024 at 01:10 PM, wn4isx wrote:
There are a few things that it doesn't show you.
?
(1)? If you are unemployed, your membership rates are cut in half, across the board.
?
(2)? If you somehow become elevated to "Senior Member", your membership is free.? I don't know what qualifies you for that level, but I'm assuming it may include your age, plus some length of time as a regular member, which might disqualify you (for a while) if you've left already and want to re-join? But I am only guessing about it.? Also, I'm guessing that the "free" part might apply only to the "groups" (IEEE Societies) that one is a.member of at the time of becoming a SM, which means that joining additional Societies after that point might incur yearly fees.? Again, I stress the fact that I am only guessing about all this and do not know actual details.
?
Sadly one typically needs membership in more then one group.
That is especially true as we were discussing access to documents via the "IEEE Xplore" digital library.
?
One's ability to freely download a given document, depends on which IEEE Society/Societies one is a member of.? If the article is within the scope of a Society where you are a member, then you can download it.? If not - sorry, no access.
?
In all fairness, IEEE does need to pay the bills and keep the lights on.? We can gripe that everything isn't free, but at the end of the day that won't work.
?
Andy
?
|
Re: Extraordinary claims require extraordinary proof
I was starting to think the same thing. Throw a few concepts and let AI do the rest. Though it has been shown that AI generated technical papers are about 10% probable. I forgot the where I found that article, but it was about a month ago it came across my viewing.
?
DerekK
|
Re: Extraordinary claims require extraordinary proof
Any chance the paper was written by AI?...
?
Dan Nicoson
?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]>
On Behalf Of wn4isx via groups.io
Sent: Monday, November 25, 2024 1:01 PM
To: [email protected]
Subject: Re: [electronics101] Extraordinary claims require extraordinary proof
?
Sigh, one of these days I might actually learn to type.
The point that worries me is the IEEE has an entire series on this concept.
I took a super bright red LED and placed it in direct contact with a "Large area Silicon Sensor features a 0.25" square silicon solar cell mounted in a pale yellow
see-thru dome. Output at noon in full sunshine is open circuit voltage 0.55V and short circuit current is 2.5mA. Brand new with long leads. "
And got about .1V @ no measurable current. I used an IR LED with zero V out.
I want some of his magic photo voltage thingies....
A friend bought a bunch for a project and I'm playing with an active solar tracker
|
Re: Extraordinary claims require extraordinary proof
I skimmed the first article and can see your points. Not sure what is "opt"-coupling; I could understand "opto"-coupling much better. Furthermore, wavelength tuning... I have a hard time that just the red LED will produce enough to stimulate a solar cell to any major degree as stated.?
?
The article also starts out early on with the statement, "However no practical devices were developed in their works." One could probably see why; this is like a cold-fusion paper.
?
DerekK
DDK-ICS
|
TFX 18210 mixer used as frequency detector
Hello , I have the following component shown below which needs to be used as frequency detector.
Is there some datasheet for this component?
I could not find datasheet in google.
/g/electronics101/photo/296358/3858703?p=Created%2C%2C%2C20%2C2%2C0%2C0
|
Is There a Digital Audio Sinewave Generator That Uses Delta Modulation?
A digital audio sinewave generator that uses delta modulation is supposed to have one output only (one MCU pin, for example).
It outputs a delta bits stream which, after filtering, gives a low THD (around 1%) sinewave.
The audio spectrum is, typically, from 20 to 20,000 Hz.
?
I asked this question because I work on such generator since about 2 years (though not full time, just in my free time).
I used to call its project ¡®Delta Sinewave Synthesis, DSS.
?
As most of you know, there is already DDS, Direct Digital Synthesis, generators.
So, if we call DDS a parallel DAC, DSS would be called a serial DAC.
?
The goal of my project is to let the hardware very simple. For example, the LPF could be just a passive 3 RC one (3 poles). This is possible if the frequency of the delta clock is made to be much higher than of the highest sinewave one of interest. In my project, it is 2,000,000 Hz (100 times higher than 20 KHz).
?
But perhaps I was just re-inventing the wheel :(
?
Kerim
|
Let's be a little careful about straying into the group's forbidden territory.? ?Just a word of caution, try to be careful.? It's good that there are no outright rants so far.
no sports, politics, or religion on the list
Andy
?
?
|
BTW, I just saw a review of the new Cad CTS. One option is a 6 speed manual trans!
Dan K
On Sunday, November 24, 2024 at 05:08:30 PM EST, wn4isx via groups.io <wn4isx@...> wrote:
Oh sure, I'll pick one up after I snag a Lotus standard shift car. [There are very few standards being made today.]? ? Right after an air force transport jet drops a ton or so of gold in our backyard. ? ? Though 18GHz is slightly above my frequencies of interest. ? Although I did get to play with an analog Ku satellite uplink/downlink, I sent a 1kHz sine wave derived from a crystal controlled oscillator, converted the square wave to a nice, low distortion sine wave. ? I fed the input to the TX and output of the RX into X/Y of a scope. The Lissajous Figure showed a slight constant change in phase. I have a Betacam (not home Beta, professional video) tape with uplink audio in one channel, downlink in the other and the image of the scope on video. I don't have access to a Betacam VCR so the data is all but lost. Such is life. ? ?But a 18GHz noise source....a bit beyond my needs and clearly beyond my means. ? ?
|
IEEE membership is free for retired members. Bertho ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Sam Reaves via groups.io
Sent: 24 November, 2024 19:11
To: [email protected]
Subject: Re: [electronics101] Post deleted? I was a IEEEE?member for decades and then when I retired I renewed for something like 50.00. Now that want over 4X than much. It's now all about the money just like the SAE which I was also a member and on some of the committees?in the 90's. Needless to say I dropped both memberships.
|
I was a IEEEE?member for decades and then when I retired I renewed for something like 50.00. Now that want over 4X than much. It's now all about the money just like the SAE which I was also a member and on some of the committees?in the 90's.
Needless to say I dropped both memberships. Sam Reaves
ARS W3OHM
Owner / Moderator of: LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io Sprint Layout Group on Groups.io?? Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
|
"
like it or not, this is how the world is designed
"
Worth noting, however, that the design is of man's creation? And, for all the ills complained of in this democratic republic, designed by those we the people have elected to represent us. There is no literacy test of potential voters, no minimum level of education, beyond the ability to complete a registration form.
Heck one could fail their driver's test a dozen times and still cast a valid ballot - or, openly carry a forty-five caliber semi-automatic weapon most everywhere (except where their elected representatives gather).
|
Being an old HP uW SE, the 346 A noise source is 10 MHz to 18 GHz. You get that range for a mere $4000 but it is flat!
Dan Kahn
On Sunday, November 24, 2024 at 03:36:18 PM EST, wn4isx via groups.io <wn4isx@...> wrote:
Thank you!? Several years ago the ARRL made Disney look like "let all our movies and cartoons be free." ? Remember when Disney went after daycares across the nation for showing VHS tapes of Disney cartoons? My wife's nephew and niece daycare received one of the "you owe us a gazillion dollars." ? The ARRL went bonkers when someone released some of their 1950s handbooks in ?1990?. I wonder how Internet Archive avoids serious copyright issues. ? I'd hate to be a popular author because dealing with copyright and the Internet would be whack a mole. ? It is better to use a LM317 or 338 instead of a variable resistor to control the light bulb. And a 12V VW cabin bulb offers higher frequency noise output. A straight filament is better then a coiled filament. ? There are better VHF/UHF noise sources like commercial noise diodes which are rather expensive. There are also "noise vacuum tubes." I have two in route, I have some doubts but I'll give them a try. ? ?
|
This issue of QST is available here:
?
?
John?? VE3CXB
|
Re: transistor help needed
On Sunday 24 November 2024 10:47:17 am sdmonaco via groups.io wrote: Hi Paul, these are what I like to use.
Hmm. A 2-pack for around $10, or a 5-pack for around $15...? I know which I'd go for. -- 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
|
For instance, when I heard of IEEE for the first time (many decades ago), I thought they were the World's Light of Knowledge.
Later, when I knew them better, it became natural to me that they have no choice to be so, like it is the case of every privileged rich man around the world (a natural truth revealed already 2000 years ago).? We like it or not, this is how the world is designed :)
?
After all, we all here were given a bright human brain to help us solve any problem that we may face and we really need to solve, mainly in electronics, right?
?
|
Derek Koonce
Bertho
Sam Reaves
Gooey