Where can I buy a large analogue meter?

Apr 14, 2022 Last reply: 4 years ago 313 Replies

Only at a stupid price compared with an ic car. In spades if you don't buy new. And that range isn't with full aircon in summer and heating in winter.

And that range isn't enough for the trips I do anyway.

Not if you don't garage or carport the car.

But needs to be done more often. No thanks.

And if it did catch fire when charging, I would lose the entire house due to where the car gets parked. Doesnt happen with my ic cars. F*ck that,

Has no advantage over an ic car, all downsides.

Sure - EVs will improve - but I doubt that I'll ever find one that is practical for me - rural living & wintery climate - and affordable. John T.

I meant I'm not sure I'll be buying cars in five years. I doubt they'll make inroads into Montana for the same reasons. Even in what passes for Spring it will be in the 20's F in the morning. Maybe if e-cars had one of those old gasoline heaters...

They have heat pumps. Last winter when I95 was stopped for hours some of the EV drivers were comfy but VA is not as cold as Montana.

I was impressed with the AC on a 95 degree day. Had to turn it down a bit.

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.

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.

Simple is a relative term, these were professionally made in a factory.

To quickly see a value from a distance.

It's volts and amps I want.

No a larger one so people can read it from 30 feet away.

£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

Doesn't that mean me designing a PWM controller?

Space in the pistons added together is the usual measurement.

Cars run on acid cells use 90% of their power moving the weight of the lead.

There must be some still kicking about.

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.

I wouldn't pay the £80 + shipping, but I'd say it was worth it to somebody, since they're antiques and rare.

Happily, I have an older house with a detached garage. Made of concrete block. (Both the house and the garage, in fact.)

you don't have pistons on an electric car.

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

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...

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