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

    From Bret Cahill@bretcahill@aol.com to sci.electronics.basics on Tue Apr 5 18:42:21 2022
    From Newsgroup: sci.electronics.basics

    The impedance is 100k +-. Put a 50 k+- resister in series with the voltmeter and map out the correction.
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  • From Commander Kinsey@CK1@nospam.com to sci.electronics.basics on Wed Apr 6 05:07:19 2022
    From Newsgroup: sci.electronics.basics

    On Wed, 06 Apr 2022 02:42:21 +0100, Bret Cahill <bretcahill@aol.com> wrote:
    The impedance is 100k +-. Put a 50 k+- resister in series with the voltmeter and map out the correction.
    I never would have thought of that. You should get a Nobel prize!
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  • From amdx@amdx@knology.net to sci.electronics.basics on Thu Apr 14 15:37:18 2022
    From Newsgroup: sci.electronics.basics

    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 +-. Put a 50 k+- resister in series with the
    voltmeter and map out the correction.

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

    -aI 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.
    -a Oh geez, it wasn't me or Paul, Jacques-Ars|?ne 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. :-)

    -a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a Mikek
    --
    This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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  • From Bret Cahill@bretcahill@aol.com to sci.electronics.basics on Fri Apr 15 20:05:47 2022
    From Newsgroup: sci.electronics.basics

    Not as easy as it sounds if you don't have a 40k +- resistor.
    Solution:
    Put _two_ voltmeters in series!
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  • From Bret Cahill@bretcahill@aol.com to sci.electronics.basics on Fri Apr 15 20:08:58 2022
    From Newsgroup: sci.electronics.basics

    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!

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  • From Commander Kinsey@CK1@nospam.com to sci.electronics.basics on Sat Apr 16 11:28:40 2022
    From Newsgroup: sci.electronics.basics

    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.
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  • From Commander Kinsey@CK1@nospam.com to sci.electronics.basics on Sat Apr 16 11:29:06 2022
    From Newsgroup: sci.electronics.basics

    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 +- resistor.

    Solution:

    Put _two_ voltmeters in series!
    An excellent money saving idea!
    --- Synchronet 3.21d-Linux NewsLink 1.2