Converting a $3 / 30v Voltmeter to A 45 v Voltmeter....

B

Bret Cahill

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The impedance is 100k Ω. Put a 50 kΩ resister in series with the voltmeter and map out the correction.
 
On Wed, 06 Apr 2022 02:42:21 +0100, Bret Cahill <bretcahill@aol.com> wrote:

> The impedance is 100k Ω. Put a 50 kΩ resister in series with the voltmeter and map out the correction.

I never would have thought of that. You should get a Nobel prize!
 
On 4/5/2022 11:07 PM, Commander Kinsey wrote:
On Wed, 06 Apr 2022 02:42:21 +0100, Bret Cahill <bretcahill@aol.com
wrote:

The impedance is 100k Ω. Put a 50 kΩ resister in series with the
voltmeter and map out the correction.

I never would have thought of that.  You should get a Nobel prize!

 I guess, They did give one to the guy that invented the knock knock joke!

BTW, I invented that idea 51 years ago when I built a voltmeter. Oh
wait, maybe
that whole idea was in the text book for my 11th grade electronics class.
Let\'s see Basic Electricity Third Edition Paul Zbar, Copyright 1956.
Hmm, must have been
a decent teaching book as we got new copies in 1972, so it was around a
long time.
  Oh geez, it wasn\'t me or Paul, Jacques-Arsène d\'Arsonval and Marcel
Deprez
developed a meter with a stationary permanent magnet and a moving wire coil
in 1882. I\'ll bet it didn\'t take them long to figure out how stop the
meter from pegging. :)

                                   Mikek

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Not as easy as it sounds if you don\'t have a 40k Ω resistor.

Solution:

Put _two_ voltmeters in series!
 
It werks up to 32.8 volts.

They LIED to me.

I just had a few shots of the good stuff and am feelin adventurous wif a fire extinguisher.

I gonna see how fur I kin git!
 
On Sat, 16 Apr 2022 04:08:58 +0100, Bret Cahill <bretcahill@aol.com> wrote:

It werks up to 32.8 volts.

They LIED to me.

I just had a few shots of the good stuff and am feelin adventurous wif a fire extinguisher.

I gonna see how fur I kin git!

Don\'t drink all the shots. Sparks can ignite it for great fun.
 
On Sat, 16 Apr 2022 04:05:47 +0100, Bret Cahill <bretcahill@aol.com> wrote:

Not as easy as it sounds if you don\'t have a 40k Ω resistor.

Solution:

Put _two_ voltmeters in series!

An excellent money saving idea!
 

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