Where can I buy a large analogue meter?...

On Thu, 14 Apr 2022 20:23:27 +0100, Sam E <not.email@all.invalid> wrote:

On 4/14/22 10:55, charles wrote:

[snip]

They may well have existed then, but given the modern alternatives
suggested by Jan that exist, I doubt there\'s a market for large meters
now.

It just isn\'t the same. Would you buy a 6.2 litre electric car?

6.2 litres of what?

Battery acid per cell?
Click to expand...

Cars run on acid cells use 90% of their power moving the weight of the lead.
 
On Fri, 15 Apr 2022 01:47:58 +0100, Clare Snyder <clare@snyder.on.ca> wrote:

On Thu, 14 Apr 2022 11:53:20 +0100, \"Jon\" <jon@nospam.cn> wrote:


\"Commander Kinsey\" <CK1@nospam.com> wrote in message
news:eek:p.1kl2tgobmvhs6z@ryzen.lan...
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

I am sure there was one used in a willy wonka film.
We had them in our highschool electronis shop. About a 24 inch face
and 270 fegree scale.
Click to expand...

There must be some still kicking about.
 
On Thu, 14 Apr 2022 22:04:28 +0100, whit3rd <whit3rd@gmail.com> wrote:

On Thursday, April 14, 2022 at 4:31:35 AM UTC-7, Commander Kinsey wrote:
On Thu, 14 Apr 2022 12:16:28 +0100, Clive Arthur <cl...@nowaytoday.co.uk> wrote:

On 14/04/2022 11:45, Commander Kinsey wrote:
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

R/C servo with pointer, PIC with ADC, code.

This shouldn\'t be necessary, in the 80s in school we had enormous voltmeters and ammeters for demonstrations. Just a simple coil meter with a long lightweight pointer.

Not so simple if you want accuracy. For one thing, the pointer ought to be counterweighted, not
just lightweight. For another, the glass pane that protects the pointer must be grounded,
or electrostatic charge will disrupt the reading. A d\'Arsonval movement is hard to scale up
and keep rugged; taut-band and such are improvements, but... servo is what\'s easily available for
a DIY project.
Click to expand...

These were for large voltages and currents (well something like 10V and 5 amps).
 
On Fri, 15 Apr 2022 05:48:50 +0100, Chris Jones <lugnut808@spam.yahoo.com> wrote:

On 14/04/2022 20:45, Commander Kinsey wrote:
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

I have such a mechanism, except it doesn\'t have the pointer or scale
fitted. In fact I have several.

They are Texas Instruments chart recorders with moving coil mechanisms
to deflect the pen across the chart. Later chart recorders use
servomotors with potentiometers for positional feedback and small
motors, but these ones just have an enormous moving coil mechanism and
no feedback.

There is an Alnico (or similar) horseshoe magnet about 5 inches in each
dimension, with curved pole pieces attached, and coil about an inch and
a half across, several inches long, in precision bearings, IIRC with a
stationary cylindrical iron piece inside the coil to increase and shape
the magnetic flux.

I have no idea what use they could be but can\'t bring myself to throw
them out. I guess they might be usable as laser galvos, though the coils
are not optimised for low moment of inertia so I think they would not be
great for that.

Unfortunately unshielded magnets weighing more than several house bricks
are not the kind of things that are easily sent in a parcel, and I live
in Australia, otherwise I would try to sell you one, or give it to you
if you asked nicely enough.
Click to expand...

I see a lot of old chart recorders on Ebay, I might get one if I can find one closer to home. A lot are in the States.

Pity you don\'t have rest of it or you could get some cash for it and someone could put it to good use.
 
On Fri, 15 Apr 2022 09:05:46 +0100, Arie de Muijnck <eternal.september@ademu.com> wrote:

On 2022-04-15 09:57, Commander Kinsey wrote:
On Thu, 14 Apr 2022 15:34:36 +0100, David <david@nospam.org> wrote:

On 14/04/2022 12:13, Commander Kinsey wrote:
On Thu, 14 Apr 2022 11:52:32 +0100, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 14 Apr 2022 11:45:06 +0100) it happened \"Commander
Kinsey\" <CK1@nospam.com> wrote in <op.1kl2tgobmvhs6z@ryzen.lan>:

Where can I buy a large analogue meter? Big enough to show to a room
of people, about a foot long pointer.

Use a small one, camera and monitor?
Or just draw it digitally on a monitor?

Could do, but I remember a long long time ago when I was at school, the
teacher had a voltmeter with a foot long needle. They must exist
somewhere.

www.ebay.co.uk/itm/175237367160?hash=item28ccf60578

Oh they\'re beautiful, but even older and better made than what I was
remembering (hence those have a lot of antique value, £92+ is a bit
much!), which was metal/plastic and cream coloured, sorta like the top
part of these post office scales but painted cream, with just a voltage
scale across it.


£80 + shipping is certainly too much.

All have centered needles for a +/- indicating instrument. All scales
are NOT so.
The 2nd is a really bad \'restoration\' job with a non-fitting scale, not
even aligned with the rotation center. The 3rd and 4th are also with a
bad replaced scale, but at least centered.

I\'d say this is only worth $15 + shipping.
Click to expand...

I wouldn\'t pay the £80 + shipping, but I\'d say it was worth it to somebody, since they\'re antiques and rare.
 
On Fri, 15 Apr 2022 16:05:20 +1000, Sylvia Else wrote:


He needs it for nothing but his well-known idiotic TROLLING here, you
troll-feeding senile idiot! <tsk

You can kill-file me if you like. I promise I won\'t mind.

Sylvia.
Click to expand...

Oh, my! (LMAO)
 
On Fri, 15 Apr 2022 10:05:46 +0200, Arie de Muijnck, another mentally
challenged, troll-feeding senile asshole, babbled:

£80 + shipping is certainly too much.

All have centered needles for a +/- indicating instrument. All scales
are NOT so.
The 2nd is a really bad \'restoration\' job with a non-fitting scale, not
even aligned with the rotation center. The 3rd and 4th are also with a
bad replaced scale, but at least centered.

I\'d say this is only worth $15 + shipping.

Arie
Click to expand...

I\'m looking forward to the moment when you troll-feeding senile assholes
will be screeching AGAIN, realizing how you\'ve been trolled by that
clinically insane sociopathic attention whore! Won\'t be long from now on.
LOL
 
On Fri, 15 Apr 2022 05:57:45 -0000 (UTC),
DecadentLinuxUserNumeroUno@decadence.org, an ESPECIALLY retarded,
troll-feeding, senile ASSHOLE, blathered, yet again:

The truth hurts, eh, you demented senile idiot who INSISTS on his
\"right\" to feed the very dumbest, best-known, clinically insane
troll and attention whore, sociopathic PHucker himself! And, YES,
that IS a typical SENILE thing, senile asshole! LOL


Says the retarded idiot unable to see that his follow along behind
and berate posts are as trolling as it gets.

You are truly pathetic, you stupid piece of shit.

Your whore mother should be put in prison for failing to flush you
the moment the severely ass fucked street slut shat you.
Click to expand...

Awww, the truth REALLY hurts ya, eh, you ESPECIALLY retarded troll-feeding
senile shithead who REFUSES to see that he\'s playing the KNOWN,clinically
insane troll\'s game ...simply because -like all senile assholes here- you
are THANKFUL, in your senile misery, that a troll keeps engaging you! LOL
 
On Fri, 15 Apr 2022 14:48:50 +1000, Chris Jones, another brain dead,
troll-feeding, senile asshole, blathered:


I have such a mechanism, except it doesn\'t have the pointer or scale
fitted. In fact I have several.
Click to expand...

All you troll-feeding senile idiots need a mechanism that indicates to you
when you are being trolled! <BG>
 
On 15/04/2022 09:08, Commander Kinsey wrote:
On Thu, 14 Apr 2022 19:37:00 +0100, Andy Bennet <aben@benj.com> wrote:

On 14/04/2022 11:45, Commander Kinsey wrote:
Where can I buy a large analogue meter?  Big enough to show to a room of
people, about a foot long pointer.

just buy a cheap servo and put a chuffin great pointer on it!

Doesn\'t that mean me designing a PWM controller?
Click to expand...

Use an arduino. Then you can use the arduino a/d convertor inputs as
well for your measurement! win win!
 
In article <op.1knp9m1tmvhs6z@ryzen.lan>, Commander Kinsey <CK1@nospam.com>
wrote:
On Thu, 14 Apr 2022 16:55:26 +0100, charles <charles@candehope.me.uk
wrote:

In article <op.1kl8yqoymvhs6z@ryzen.lan>, Commander Kinsey
CK1@nospam.com> wrote:
On Thu, 14 Apr 2022 13:45:24 +0100, Sylvia Else <sylvia@email.invalid
wrote:

On 14-Apr-22 9:13 pm, Commander Kinsey wrote:
On Thu, 14 Apr 2022 11:52:32 +0100, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 14 Apr 2022 11:45:06 +0100) it happened
\"Commander Kinsey\" <CK1@nospam.com> wrote in
op.1kl2tgobmvhs6z@ryzen.lan>:

Where can I buy a large analogue meter? Big enough to show to a
room of people, about a foot long pointer.

Use a small one, camera and monitor? Or just draw it digitally on
a monitor?

Could do, but I remember a long long time ago when I was at school,
the teacher had a voltmeter with a foot long needle. They must
exist somewhere.

They may well have existed then, but given the modern alternatives
suggested by Jan that exist, I doubt there\'s a market for large
meters now.

It just isn\'t the same. Would you buy a 6.2 litre electric car?

6.2 litres of what?

Space in the pistons added together is the usual measurement.
Click to expand...

you don\'t have pistons on an electric car.

--
from KT24 in Surrey, England
\"I\'d rather die of exhaustion than die of boredom\" Thomas Carlyle
 
On 14/04/2022 20:45, Ed Pawlowski wrote:
On 4/14/2022 2:44 PM, Jock wrote:


Would you buy a 6.2 litre electric car?

I\'m not actually stupid enough to buy any electric car.

Wait 5 years.  They will be much better in many ways. New battery
material, greater range, charging times not much different that pumping
a tank of gas.
Click to expand...
wait 5 years ... if they haven\'t got much better - same battery
material, same range, charging times not much different than now - then
quietly forget the whole idea...

--
WOKE is an acronym... Without Originality, Knowledge or Education.
 
On Fri, 15 Apr 2022 10:05:47 +0100, Andy Bennet, yet another mentally
deficient troll-feeding senile ASSHOLE, bullshitted:


Doesn\'t that mean me designing a PWM controller?

Use an arduino. Then you can use the arduino a/d convertor inputs as
well for your measurement! win win!
Click to expand...

Is he \"asking questions\" again, you dumb senile assholes? LOL And you
miserable morons all ARE thankful when some trolling psycho seems to be
\"asking\" you something, aren\'t you? You\'ll soon learn what his \"questioning\"
is all about! LOL

--
damduck-egg@yahoo.co.uk about Birdbrain Macaw\'s (now \"Commander Kinsey\" LOL)
trolling:
\"He is a well known attention seeking troll and every reply you
make feeds him.
Starts many threads most of which die quick as on the UK groups anyone
with sense Kill filed him ages ago which is why he now cross posts to
the US groups for a new audience.
This thread was unusual in that it derived and continued without him
to a large extent and his silly questioning is an attempt to get
noticed again.\"
MID: <be195d5jh0hktj054mvfu7ef9ap854mjdb@4ax.com>
 
On Fri, 15 Apr 2022 10:00:46 +0100, charles, another mentally
deficient, troll-feeding, senile asshole, blathered again:

> you don\'t have pistons on an electric car.

But that nutter DOES have psychiatric certificates that tell the authorities
that he only can do some government-sponsored jobs! (He suffers, by his own
account, among many other things, from extreme \"tiredness\"! LOL)
 
On Fri, 15 Apr 2022 18:09:12 +1000, Commander Kinsey <CK1@nospam.com>
wrote:

On Thu, 14 Apr 2022 16:55:26 +0100, charles <charles@candehope.me.uk
wrote:

In article <op.1kl8yqoymvhs6z@ryzen.lan>, Commander Kinsey
CK1@nospam.com
wrote:
On Thu, 14 Apr 2022 13:45:24 +0100, Sylvia Else <sylvia@email.invalid
wrote:

On 14-Apr-22 9:13 pm, Commander Kinsey wrote:
On Thu, 14 Apr 2022 11:52:32 +0100, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 14 Apr 2022 11:45:06 +0100) it happened
\"Commander Kinsey\" <CK1@nospam.com> wrote in
op.1kl2tgobmvhs6z@ryzen.lan>:

Where can I buy a large analogue meter? Big enough to show to a
room of people, about a foot long pointer.

Use a small one, camera and monitor? Or just draw it digitally on a
monitor?

Could do, but I remember a long long time ago when I was at school,
the teacher had a voltmeter with a foot long needle. They must
exist
somewhere.

They may well have existed then, but given the modern alternatives
suggested by Jan that exist, I doubt there\'s a market for large
meters
now.

It just isn\'t the same. Would you buy a 6.2 litre electric car?

6.2 litres of what?

Space in the pistons added together is the usual measurement.
Click to expand...

There are no pistons in an electric car, stupid.
 
On a sunny day (Fri, 15 Apr 2022 09:08:46 +0100) it happened \"Commander
Kinsey\" <CK1@nospam.com> wrote in <op.1knp8wj5mvhs6z@ryzen.lan>:

On Thu, 14 Apr 2022 19:37:00 +0100, Andy Bennet <aben@benj.com> wrote:

On 14/04/2022 11:45, Commander Kinsey wrote:
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

just buy a cheap servo and put a chuffin great pointer on it!

Doesn\'t that mean me designing a PWM controller?
Click to expand...

Just for the sake of argument,
and because posting to DIY and electronics.design
driving an RC servo is not that hard:
http://panteltje.com/panteltje/pic/camc_pic/
you will have to learn PIC asm ;-)

You may want to use a PIC with ADC so you can measure voltage
I use a lot of 18F14K22 in all sort of projects
http://panteltje.com/panteltje/pic/index.html

some other stuff:
http://panteltje.com/panteltje/newsflex/download.html

Here is an other of my PIC servo driver projects at work:
https://www.youtube.com/watch?v=xS_K4caj7vc
camera acquiring and tracking object
 
On Fri, 15 Apr 2022 10:00:46 +0100, charles <charles@candehope.me.uk> wrote:

In article <op.1knp9m1tmvhs6z@ryzen.lan>, Commander Kinsey <CK1@nospam.com
wrote:
On Thu, 14 Apr 2022 16:55:26 +0100, charles <charles@candehope.me.uk
wrote:

In article <op.1kl8yqoymvhs6z@ryzen.lan>, Commander Kinsey
CK1@nospam.com> wrote:
On Thu, 14 Apr 2022 13:45:24 +0100, Sylvia Else <sylvia@email.invalid
wrote:

On 14-Apr-22 9:13 pm, Commander Kinsey wrote:
On Thu, 14 Apr 2022 11:52:32 +0100, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Thu, 14 Apr 2022 11:45:06 +0100) it happened
\"Commander Kinsey\" <CK1@nospam.com> wrote in
op.1kl2tgobmvhs6z@ryzen.lan>:

Where can I buy a large analogue meter? Big enough to show to a
room of people, about a foot long pointer.

Use a small one, camera and monitor? Or just draw it digitally on
a monitor?

Could do, but I remember a long long time ago when I was at school,
the teacher had a voltmeter with a foot long needle. They must
exist somewhere.

They may well have existed then, but given the modern alternatives
suggested by Jan that exist, I doubt there\'s a market for large
meters now.

It just isn\'t the same. Would you buy a 6.2 litre electric car?

6.2 litres of what?

Space in the pistons added together is the usual measurement.

you don\'t have pistons on an electric car.
Click to expand...

Clearly the units have to be converted.
 
On Fri, 15 Apr 2022 10:05:47 +0100, Andy Bennet <aben@benj.com> wrote:

On 15/04/2022 09:08, Commander Kinsey wrote:
On Thu, 14 Apr 2022 19:37:00 +0100, Andy Bennet <aben@benj.com> wrote:

On 14/04/2022 11:45, Commander Kinsey wrote:
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

just buy a cheap servo and put a chuffin great pointer on it!

Doesn\'t that mean me designing a PWM controller?

Use an arduino. Then you can use the arduino a/d convertor inputs as
well for your measurement! win win!
Click to expand...

Never played with those things. I only have 100 cores of Window PC.
 
On 15/04/2022 12:28, Jan Panteltje wrote:
On a sunny day (Fri, 15 Apr 2022 09:08:46 +0100) it happened \"Commander
Kinsey\" <CK1@nospam.com> wrote in <op.1knp8wj5mvhs6z@ryzen.lan>:

On Thu, 14 Apr 2022 19:37:00 +0100, Andy Bennet <aben@benj.com> wrote:

On 14/04/2022 11:45, Commander Kinsey wrote:
Where can I buy a large analogue meter? Big enough to show to a room of
people, about a foot long pointer.

just buy a cheap servo and put a chuffin great pointer on it!

Doesn\'t that mean me designing a PWM controller?

Just for the sake of argument,
and because posting to DIY and electronics.design
driving an RC servo is not that hard:
http://panteltje.com/panteltje/pic/camc_pic/
you will have to learn PIC asm ;-)
Click to expand...

No. It can be done entirely in analogue. Servo motor controls a
potentiometer that balances out a potential divider to match the
incoming unknown voltage. Classic A level physics experiment.

Put a needle on the shaft of the pot and you are done!

It is how all servos were done once upon a time in the pre digital age.

--
Regards,
Martin Brown
 
On 4/15/2022 5:11 AM, The Natural Philosopher wrote:
On 14/04/2022 20:45, Ed Pawlowski wrote:
On 4/14/2022 2:44 PM, Jock wrote:


Would you buy a 6.2 litre electric car?

I\'m not actually stupid enough to buy any electric car.

Wait 5 years.  They will be much better in many ways. New battery
material, greater range, charging times not much different that
pumping a tank of gas.
wait 5 years ... if they haven\'t got much better - same  battery
material, same range, charging times not much different than now - then
quietly forget the whole idea...
Click to expand...

Obviously you have never seen the evolution of cars, airplanes,
electronics and the advances that can be made in five years.

Cars today no longer have to be hand cranked to start and the top models
even have heaters in them. Amazing the progress they made.
 
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