Digest for sci.electronics.repair@googlegroups.com - 25 updates in 4 topics

TheExperimenter <theexp8712@noaol.net>: Nov 06 06:33PM -0500

Ok, this post is for all the people making a big fuss when I asked about
stun gun components. I got ahold of one this week called VIPERTEK
VTS-881, a small red unit with a claimed "35 billion" volts. This
design comes in many forms and is marketed by different firms with
Vipertek being only one.
 
First tests were spark gap distance. Just under 1/2". Spark gap is
adjustable and discharges really slow down/ stop at 1/2" or more. So,
what does that tell you about voltage? For one thing, no where near the
volts advertised.
 
Next tests were one me. Now keep in mind before you shout, if you are
in a country where they are illegal, then don't read the post and
certainly don't reply. If I get any heat from this report, you go into
the kill file immediately so I won't see any further posts. Where I am
in the US, they are LEGAL.
 
I first adjusted the spark gap for maximum distance, then tested myself
in six different spots: right arm, stomach, upper leg, side, foot, and
finally shoulder. Each spot was energized with electrodes pressed
against the skin for 2-4 seconds (there's no way this thing is going to
penetrate through most clothing, by the way). It took four tries before
I even began to feel much other than a tingle. Finally, pain increased
a bit in arm and shoulder. If I were to scale it, I would say 5/10 at
most. Would it have stopped me from attacking someone who used it one
me? No.
 
I don't know what all the fuss was about. It's clear that these are
being falsely marketed from the start and giving people a false sense of
security. I'd be more concerned over this then my irrelevant request
for substitute parts. Now, that being said, keep in mind that I am 6'
1" tall and 215 lbs and healthy. You still wouldn't want to use this on
the elderly or anyone with heart issues or a pacemaker, nor is everyone
else going to respond to the shocks the way I did. However, after the
apparent rukus I made with my prior post, I felt it was time to see just
how much relevancy there was behind it. Now it should be clear. Bye.
Rheilly Phoull <rheilly@bigslong.com>: Nov 07 07:39AM +0800

On 7/11/2019 7:33 am, TheExperimenter wrote:
> else going to respond to the shocks the way I did.  However, after the
> apparent rukus I made with my prior post, I felt it was time to see just
> how much relevancy there was behind it.  Now it should be clear.  Bye.
 
Well there ya go !! feel better now?
TheExperimenter <theexp8712@noaol.net>: Nov 06 06:41PM -0500

On 11/6/19 6:39 PM, Rheilly Phoull wrote:
>> was time to see just how much relevancy there was behind it.  Now it
>> should be clear.  Bye.
 
> Well there ya go !! feel better now?
 
It just goes to show irrelevancy at its finest and how easy it often is
to defeat.
Sjouke Burry <burrynulnulfour@ppllaanneett.nnll>: Nov 07 02:44AM +0100

On 07.11.19 0:33, TheExperimenter wrote:
> else going to respond to the shocks the way I did. However, after the
> apparent rukus I made with my prior post, I felt it was time to see just
> how much relevancy there was behind it. Now it should be clear. Bye.
 
Yes. Plonk.
bitrex <user@example.net>: Nov 06 09:13PM -0500

On 11/6/19 6:33 PM, TheExperimenter wrote:
> else going to respond to the shocks the way I did.  However, after the
> apparent rukus I made with my prior post, I felt it was time to see just
> how much relevancy there was behind it.  Now it should be clear.  Bye.
 
Yo you ever tried dating girls or something to get a thrill? It's a
hobby less hazardous to your health...sometimes cheaper, too
TheExperimenter <theexp8712@noaol.net>: Nov 06 09:16PM -0500

On 11/6/19 9:13 PM, bitrex wrote:
>> should be clear.  Bye.
 
> Yo you ever tried dating girls or something to get a thrill? It's a
> hobby less hazardous to your health...sometimes cheaper, too
 
Yes to the above, but it was necessary to make a point on unwarranted
behavior first.
Ralph Mowery <rmowery28146@earthlink.net>: Nov 06 11:19PM -0500

In article <qpvl8e$hvg$1@dont-email.me>, theexp8712@noaol.net says...
> VTS-881, a small red unit with a claimed "35 billion" volts. This
> design comes in many forms and is marketed by different firms with
> Vipertek being only one.
 
That 35 billion volts should be a tipoff the thing is a toy.
 
The 35 billion volts would probably throw an arc miles long.
 
Lightning is reported ot have from 100 million to 1 billion volts.
 
 
Tasers are only around 50,000 volts
Jasen Betts <jasen@xnet.co.nz>: Nov 07 04:50AM

> adjustable and discharges really slow down/ stop at 1/2" or more. So,
> what does that tell you about voltage? For one thing, no where near the
> volts advertised.
 
It's about 3000V/mm so ballpark 35kV
 
35GV would produce gamma rays.
 
 
 
--
When I tried casting out nines I made a hash of it.
bitrex <user@example.net>: Nov 07 12:14AM -0500

On 11/6/19 11:50 PM, Jasen Betts wrote:
>> volts advertised.
 
> It's about 3000V/mm so ballpark 35kV
 
> 35GV would produce gamma rays.
 
The OP didn't have to tell us he was American it's entirely natural
process for an American to not at all believe what some engineers say
about it and have to shock themselves multiple times with a stun gun to
figure out that it doesn't actually produce 35 billion volts, and write
an angry letter to the mfgr that it didn't at all blast them straight
thru a wall when it was turned on. what a rip off.
 
I have some understanding of the psychology of my compatriots. /shrug
TheExperimenter <theexp8712@noaol.net>: Nov 07 02:55AM -0500

On 11/7/19 12:14 AM, bitrex wrote:
> figure out that it doesn't actually produce 35 billion volts, and write
> an angry letter to the mfgr that it didn't at all blast them straight
> thru a wall when it was turned on. what a rip off.
 
Unfortunately, such an angry letter would do no good since *many*
venders are selling these identical units under many different brand
names and models.
 
Well, before I tested it, I did some research. Information is available
online as to its true voltage and current, both of which were the
determining factors to test or not.
 
Martin Brown <'''newspam'''@nezumi.demon.co.uk>: Nov 07 09:07AM

On 06/11/2019 23:33, TheExperimenter wrote:
> adjustable and discharges really slow down/ stop at 1/2" or more.  So,
> what does that tell you about voltage?  For one thing, no where near the
> volts advertised.
 
Depends a bit on air pressure and a lot on humidity but probably
somewhere between 10kV and 30kV if it will only jump half an inch.
 
http://highvoltageconnection.com/articles/paschen-curve.html
 
Could even be less if the electrodes are sharp and pointed.
 
These are real sparks and real men inside the chain mail suits:
 
https://www.youtube.com/watch?v=3FpjcOWwiI4
 
(skip the first minute of dross)
 
This would stop your attacker but it isn't very portable.
 
> else going to respond to the shocks the way I did.  However, after the
> apparent rukus I made with my prior post, I felt it was time to see just
> how much relevancy there was behind it.  Now it should be clear.  Bye.
 
Darwin award candidate.
 
--
Regards,
Martin Brown
"pfjw@aol.com" <peterwieck33@gmail.com>: Nov 07 06:11AM -0800

Vos non potestis figere stultus.
 
Peter Wieck
Melrose Park, PA
Fox's Mercantile <jdangus@att.net>: Nov 07 08:37AM -0600

> Vos non potestis figere stultus
 
Or as they say around here, "You can't fix stupid."
 
--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com
Tim R <timothy42b@aol.com>: Nov 07 07:47AM -0800

On Thursday, November 7, 2019 at 4:07:27 AM UTC-5, Martin Brown wrote:
 
> https://www.youtube.com/watch?v=3FpjcOWwiI4
 
> (skip the first minute of dross)
 
> This would stop your attacker but it isn't very portable.
 
Thanks for sharing, I enjoyed that video.
 
Why test on yourself? Just go on youtube and watch hundreds of videos of police tasering people. Most of the time they are not incapacitated, they just keep screaming "stop tasering me."
TheExperimenter <theexp8712@noaol.net>: Nov 07 11:16AM -0500

On 11/7/19 10:47 AM, Tim R wrote:
 
>> This would stop your attacker but it isn't very portable.
 
> Thanks for sharing, I enjoyed that video.
 
> Why test on yourself? Just go on youtube and watch hundreds of videos of police tasering people. Most of the time they are not incapacitated, they just keep screaming "stop tasering me."
 
2 reasons:
 
1) To prove that the devices being marketed to the public are *not* the
same devices the police are using (aka false advertising) and
 
2) To address all those here with unwarranted concern. There is
concern, but is not the concern that should have been addressed.
Fletcher <fletcherfletch@example.com>: Nov 07 04:53AM -0500

What adhesive to repair nylon halved pencil sharpener gear?
http://img4.imagetitan.com/img.php?image=20_image5623.jpg
If it fails, what online pencil sharpener do you recommend?
Andy Burns <usenet@andyburns.uk>: Nov 07 10:19AM

Fletcher wrote:
 
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
 
Maybe 3M DP8005, but it's not cheap, and the dual tube syringe is meant
to be used with a dedicated applicator
Phil Allison <pallison49@gmail.com>: Nov 07 02:26AM -0800

Fletcher wrote:
---------------
 
> What adhesive to repair nylon halved pencil sharpener gear?
 
** Doubt there is any glue for Nylon under high stress.
 
 
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
 
 
** I might be tempted to make a 1mm thick aluminium disc with large hole to fit over the broken gear. Then fasten it with numerous 2mm or 6BA nuts, washers and bolts.
 
Repaired a few broken plastic things with similar re-enforcing plates.
 
Worked for years afterwards.
 
That the item is of low value makes it more rewarding.
 
 
 
.... Phil
John-Del <ohger1s@gmail.com>: Nov 07 04:24AM -0800

On Thursday, November 7, 2019 at 4:53:46 AM UTC-5, Fletcher wrote:
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
> If it fails, what online pencil sharpener do you recommend?
 
Nylon is tough to bond. I've never seen any adhesive do more than support it's own weight at best.
 
In any case, the gear is so thin that edge adhesion won't hold even with a suitable adhesive assuming one exists. I've done plastic gears like that by epoxying a suitable size washer on both sides if you have the clearance. But those were regular plastic. I don't know if that will work on nylon even given the large contact area of two washers and epoxy. You can always drill through the gear and washer sandwich and pin both sides together. It also looks like it has tooth damage as well, so if you get it to work it will thump as it rotates as long as it doesn't jam.
 
Other than that, an old timer with a jeweler's lathe could make one for you out of metal, or if you know a tool maker.
Tim Schwartz <tim@bristolnj.com>: Nov 07 08:56AM -0500

On 11/7/2019 4:53 AM, Fletcher wrote:
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
> If it fails, what online pencil sharpener do you recommend?
 
Hi,
 
I bought a 3D printed replacement gear for my Boston electric pencil
sharpener for around $10 on e-bay. Now there are several vendors, and a
couple of variations, so you could search e-bay for:
 
"Boston pencil sharpener gear" and find several choices.
 
Regards,
Tim
Tim Schwartz <tim@bristolnj.com>: Nov 07 08:57AM -0500

On 11/7/2019 4:53 AM, Fletcher wrote:
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
> If it fails, what online pencil sharpener do you recommend?
 
 
Hi,
 
I bought a 3D printed replacement gear for my Boston electric pencil
sharpener for around $10 on e-bay. Now there are several vendors, and a
couple of variations, so you could search e-bay for:
 
"Boston pencil sharpener gear" and find several choices.
 
Regards,
Tim
"\"Retired"@home.com: Nov 07 09:13AM -0500

On 11/7/19 4:53 AM, Fletcher wrote:
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
> If it fails, what online pencil sharpener do you recommend?
 
Is this what you need ?
 
https://www.amazon.com/Boston-Gear-YP3280-Molded-Delrin/dp/B004NYAJQ4/ref=sr_1_23?crid=2W1IXPQCBB690&keywords=boston+gear+32+teeth&qid=1573135820&sprefix=boston+gear%2Caps%2C145&sr=8-23#feature-bullets-btf
 
or https://tinyurl.com/y6kqhouq
Ed Pawlowski <esp@snet.xxx>: Nov 07 10:14AM -0500

On 11/7/2019 4:53 AM, Fletcher wrote:
> What adhesive to repair nylon halved pencil sharpener gear?
> http://img4.imagetitan.com/img.php?image=20_image5623.jpg
> If it fails, what online pencil sharpener do you recommend?
 
No adhesive will work well for that type of break but cyanoacrylates are
supposed to work on nylon.
 
 
How does an online pencil sharpener work? Put the pencil into the wifi?
tabbypurr@gmail.com: Nov 06 02:57PM -0800

On Tuesday, 5 November 2019 20:31:27 UTC, Phil Allison wrote:
 
> ** Three deliberate lies in one short sentence.
 
> Might be a bullshit record.
 
> ..... Phil
 
you've outstupided yourself.
legg <legg@nospam.magma.ca>: Nov 06 12:12PM -0500

>sensor. Balancing terminals seem inactive.
 
>Can anyone recommend a tutorial on poking a serial port
>for status / data register contents ?
 
<snip>
 
Just had J1939 dumped in my lap. Without the vendors
com software, I'm afraid this is beyond poking.
 
RL
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