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 Discussion on question by Pllsz: Why …

Imported from a comment discussion on electronics.stackexchang...
VTNCaGNtdDVNalUy
Aug 12, 2020 18:32
Oversampling by a large amount has always been the key to re-construct a waveforms true shape. If a sinewave there are filter options to blend edges.
 

 Electrical Engineering

A place to talk with friends from the EE community about vacuu...
2
VTNCaGNtdDVNalUy
Aug 6, 2020 05:57
Not a complaint, just a heads up. Neither Chrome nor Opera 64 bit version on my Dell 690 workstation (Windows) show the "Quoted" material correctly. I see a gray bar to the left of a quoted paragraph-that is all. Note that my Android phone and tablet work just fine. ALL other markups are as they should be.
Sparky256
May 5, 2018 20:59
@W5VO. I added a 'resistor' tag to that post, but could not find a plain 'chart' tag, and I do not have enough rep points to create one. I have edited many tags that were created but had no description. Nice job with the mathjax.
Sparky256
May 4, 2018 20:47
I found a resistance tolerance chart and put it on this page with the link. Can it be 'tagged' so others can find it?
Sparky256
May 4, 2018 20:45
7
A: Interpreting alphanumeric code on power resistor

Sparky256I would not bet the bank on this, but that code looks a lot like 5 watts, 0.03 ohms, which would be a good in-rush current limiter for a motor. A sign (sometimes the letter 'R') is placed between the ohms value to indicate it is 1 ohm or less, or a fractional value. The 'sign' is a virtual decima...

Sparky256
Apr 29, 2018 14:16
@Zeta.Investigator
Sparky256
Apr 29, 2018 14:14
I am filing a personal complaint against Andy aka over the following topic . That is twice now he has come in late and taken away 'accepted' 15 points from me without explaining why, when my answer was sound logic. Either he goes or I leave this site. I do not need an asshole seeking vendetta-like behavior around me.
https://electronics.stackexchange.com/questions/370952/snubber-on-the-line-or-just-the-inductor/370960#370960
Sparky256
Mar 23, 2018 21:54
It was like teaching a blind man what the color red looks like.
Sparky256
Mar 23, 2018 21:53
Thanks for the help with:electronics.stackexchange.com/questions/364139/…
 

 Discussion on question by Samuel Walk…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jul 28, 2020 01:37
Please show specific needs and possible solution. Are you just doubting the math? I = V/R. I * R = V. I * V = watts (DC or RMS value).
 

 Discussion on question by Pllsz: Why …

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jul 17, 2020 05:05
The Nyquist frequency is the minimum needed just to "see" something. To get a clean picture of an arbitrary waveform you may need to over-sample by 64 times. If it is only a sine-wave you can add low-pass filters to smooth it out.
 

 Discussion on question by Samuel Walk…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jul 16, 2020 01:29
Because our body acts like a resistor, doubling the voltage puts 4 times the wattage through our body. 480 VAC hits 16 times as hard as 120 VAC.
Sparky256
Jul 16, 2020 01:26
I know someone who grabbed phase A and C of a 600 VAC 3-phase surge suppressor. The image of the copper bus bars are forever burned into the palms of each hand. How he survived we do not know.
Sparky256
Jul 16, 2020 01:21
A 25 watt solder iron will burn you as it is confined resistive heat. In this case the volts and amps that drive it are not so important.
Sparky256
Jul 16, 2020 01:19
Volts times amps is watts, so if not a shock hazard it could be a burn hazard.
Sparky256
Jul 16, 2020 01:15
NEC code puts a voltage limit of exposed conductors at 48 VDC or 36 VAC sinewave. Current is more of a hot-wire issue, not a shock issue.
 

 Discussion on question by MikeTeX: Ar…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jul 11, 2020 22:06
Normally one would want to extract a signal from a cluster of frequencies, such as picking out one channel out of thousands on cable TV.
 

 Discussion on question by Gabriel Sta…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jun 29, 2020 15:49
"pulled-down" is the same as a partial short-circuit, thus fuses will blow or breakers will trip or parts will go "BANG".
Sparky256
Jun 29, 2020 15:49
@mkeith The OP did not mention generators, and I am for anything intrinsically safe. Already synchronous or self-synchronous or sum DC values into a huge inverter. OP cannot mix apples and oranges on this one...
 

 Discussion on question by McCarter: M…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jun 29, 2020 15:16
What frequency does this operate at?
 

 Discussion on question by The Pointer…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jun 26, 2020 17:48
Be careful about product recommendations. That is out of bounds for us.
Sparky256
Jun 26, 2020 17:48
The mat should allow you to reach most things if you have to get up and walk a step or two. If way oversized it is wasted money, but normally you buy pre-cut sizes then trim to fit
Sparky256
Jun 26, 2020 17:48
If you keep your trays of parts and often-used test equipment close by then your mat needs to be no larger then the distance to these objects. Yes you can wrist-strap your ankle but your now tied to your location, and it will pull out if you move without disconnecting it. I sense your trying to keep this budget very small, so just buy what gets you by to start with, then add more later on. NO MFG plant started out with 100% of what it needed up front.
Sparky256
Jun 26, 2020 17:48
ESD protocols do have some cost, but as a single bench user yours is minimal. By the time you add the cost of wrist straps and possibly heel/ankle straps and anti-static bags and bins and tools (grounded solder irons) you may have spent a few hundred, so a small anti-static floor mat is extra protection at a low cost.
 

 Discussion on answer by Andy aka: Why…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jun 13, 2020 04:28
Stop bit should be = 1, as the end of data or no data at all means a continuous '1' state or 'idle' state, thus making it easy to detect the next start bit. Accepted data bits are counted so a byte-sized I/O is maintained.
 

 EE - Ask a Moderator

A place to ask those little questions that a moderator can hel...
Sparky256
Jun 27, 2019 19:49
@w5vo, @Clabacchio, @DaveTweed, @NickAlexeev Request that this post be considered 'locked' to protect it from spam and me-too answers. electronics.stackexchange.com/questions/358620/…
Sparky256
Mar 18, 2019 17:53
@W5VO Nothing. The page was a mess so I deleted my answer, and posted a message to the OP that I would no longer answer his messages to me. OP has a funny home page. Two yeas on the SE sites, and very few rep points. I wonder if her is just playing with us. I am done with it, sorry to waste your time.
Sparky256
Mar 17, 2019 22:37
@w5vo, @Clabacchio, @DaveTweed, @NickAlexeev. Please check:electronics.stackexchange.com/questions/427647/…. The answers are wrong as the OP has NOT drawn a constant current circuit, but asked me to do so. The answers with upvotes are wrong, based on a incorrect drawing.
Sparky256
Feb 25, 2019 01:16
@NickAlexeev I see now that I MUST do that once in a while. I see the "Elders" here doing that sometimes.
Sparky256
Feb 24, 2019 19:53
@w5vo, @Clabacchio, @DaveTweed, @NickAlexeev. Someone back in 2016 once told me you need a thick skin to survive on the EE.SE site. Now I understand more than ever. lately I have had long streams of no answers, answers I have had to delete due to nitpicky downvoting, stranded answers with no votes because the OP typed in a 'Thank-you', but cast no votes. They just take the helpful answers and run. Am I better just to sweat it out and not over react?
Sparky256
Oct 17, 2018 22:17
0
A: Is this a Disconnector beside MOVs?

Sparky256In the USA UL 3rd and 4th edition and ISO require all SPD devices to have both thermal disconnects as well as fast blow fuses. The fuses protect against sudden overloads due to a powerful surge, such as a lightning strike. The thermal fuse protects the SPD from over voltage which may cook the M...

Sparky256
Oct 17, 2018 22:17
I was wondering if this Q & A was stranded, because I was up all night trying to explain the same things over and over again to the OP, who seemed to accept my answers but cast no vote. It was to late for any passerby to see it.
Sparky256
Sep 12, 2018 04:34
Ok, now I understand. The tag was on the meta site.
Sparky256
Sep 12, 2018 04:33
Because my submitted wiki tag excerpt was edited from my original wording perhaps that voids me collecting any rep point. I am glad to see the crucial parts of what I wrote were kept in the final rendition.
Sparky256
Sep 12, 2018 04:05
Maybe this tag is too hot to handle. The Community may want to keep quiet about it. But I should get my rep points if it was accepted. I am very careful about the wording of my wiki tag edits. If accepted someone owes me 2 points.
Sparky256
Sep 12, 2018 03:05
@Kortuk, @w5vo, @Clabacchio, @DaveTweed, @NickAlexeev. 10 days ago I submitted an edit to an empty tag with no description. It was the 'mod-abuse' tag and my input was not accepted. If accepted wiki tags get you 2 rep points, else you here nothing. My sentence "The moderators judgement is called into question" may have been too much to swallow. Questions is why have such a tag if opinions will be very polarized?
Sparky256
Sep 9, 2018 03:35
@Kortuk, @w5vo, @Clabacchio, @DaveTweed, @NickAlexeev. How do I clear out "Ignored Tags"? I see ways to add more but I did not want any to begin with. As it is it just grays them out so I can still see and answer them.
Sparky256
Jun 21, 2018 23:28
@Kortuk, @w5vo, @Clabacchio, @DaveTweed, or @NickAlexeev. More and more often I need to copy chart data from a pdf or shmtl file to my answer. A few items are ok but I need a chart format to make some of them look nice. Also, using quotes on such items tends to mangle any chart 'emulation' you put together. Is there a markup language for charts?
Sparky256
May 7, 2018 03:34
Did this one get missed in the voting process, or is the weekend that slow? electronics.stackexchange.com/questions/372647/…
Sparky256
Apr 30, 2018 22:39
2
A: Snubber on the line or just the inductor

Sparky256When you switch off a high value inductor, it dumps a reverse charge back into the circuit. The best place for a snubber diode is at the coil/inductor, however it still allows about -1 volts to come back to the source. You can insert a 10 ohm resistor in series at point 'C' to help trap the back...

Sparky256
Apr 30, 2018 21:26
The point is that arguing with the OP as to who has the best answer is NOT good. We look like the Keystone cops. You have heard of badgering the witness, well this is badgering the OP. I should make this an admin issue.
Sparky256
Apr 30, 2018 21:26
@Zeta.Investigator, @laptop, @Kortuk, @w5vo, @Clabacchio, @DaveTweed, or @NickAlexeev Let me get things straight for some bone-heads out there. The issue was NOT that Andyaka talked the OP into un-checking my answer hours later, it was that he fed the OP a line of drivel, seen in their comments, until the OP left the site in a rage, and now no longer trust us for answers. The OP did NOT check Andyaka's answer either.
Sparky256
Apr 29, 2018 18:32
@NickAlexeev My understanding out it now is that a few hours after the OP accepted my answer somehow Andy aka convinced the OP that my answer was not the best. So the OP took away my 15 point by unchecking my answer. I find it ironic that Andy's answer was not accepted either. Possibly the OP is tired of it all and just left things as they are.
Sparky256
Apr 29, 2018 14:47
I am filing a personal complaint against Andy aka over the following topic . That is twice now he has come in late and taken away 'accepted' 15 points from me without explaining why, when my answer was sound logic. Either he goes or I leave this site. I do not need an asshole seeking vendetta-like behavior around me.
electronics.stackexchange.com/…
@Zeta.Investigator, @Kortuk, @w5vo, @Clabacchio, @DaveTweed, or @NickAlexeev
 

 Discussion on question by Akh: Cause …

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Feb 22, 2019 22:42
I would check the Vout pin, which is actually a feedback to sense the output voltage. Possible trace interference or the ESR of the output capacitor causing instability. Since this is part of a feedback loop, once it goes unstable it will spiral out of control. Check your Vout trace with a microscope, and verify the ESR of the output capacitor. Also make sure all local grounds are as fat as space will allow.
 

 Discussion on question by CavemanEngi…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Jan 17, 2019 13:25
With that much current you may want to consider the 6A06 or 6A10 series of 6 amp rectifiers. Also how do you limit current if the motor or gate jams?
 

 Discussion between Sparky256 and user…

Imported from a comment discussion on electronics.stackexchang...
Sparky256
Mar 23, 2018 02:47
It is getting late
Sparky256
Mar 23, 2018 02:47
But not precision op-amps
Sparky256
Mar 23, 2018 02:47
This is ok for RF circuits.
Sparky256
Mar 23, 2018 02:46
If Re is only a resistor it is subject to voltage changes.