Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups Warmoth.com
Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups Warmoth.com
Asher Guitars WD Music Products Amplified Parts Mod Kits DIY Nordstarnd Pickups Warmoth.com

Brainy Memorial Assortment of Miscellaneous Projects

Discussion in 'Tele Home Depot' started by jimdkc, Aug 1, 2016.

  1. jimdkc

    jimdkc Friend of Leo's Silver Supporter

    Age:
    61
    Mar 12, 2009
    Independence, MO
    Yes... but, ONLY if you have a known reference magnet or a known good gaussmeter that you can calibrate to!

    Anybody building this circuit without a known reference magnet, I'd recommend sticking with the 30K resistor. Or, use a trimpot and set it to 30K. You could always adjust it later if you ever get access to a known magnet or another gaussmeter for comparison. I'd recommend a 100K trim pot.

    With the sensitivity of the sensor ranging from 1.0 to 1.6 mv/gauss, the smaller resistor would need to range from 0Ω to 60K. A 100K trimpot provides that full range, and then some.

    Even with a fixed 30K resistor and nothing to calibrate against, you would still have a useful instrument that can be used for relative readings...
     

  2. jimdkc

    jimdkc Friend of Leo's Silver Supporter

    Age:
    61
    Mar 12, 2009
    Independence, MO
    Also, I highly recommend a multi-turn trim pot, like one of these:

    [​IMG] [​IMG]

    Instead of a single-turn trimpot like these:

    [​IMG] [​IMG] [​IMG]

    The multi-turn pots are more accurate to set, less likely to be changed accidentally, and will hold their set value better.
     
    mPacT likes this.

  3. mPacT

    mPacT Tele-Holic

    892
    Dec 23, 2014
    Burbank, CA
    You know, I could work up an enclosure for this when the design is finalized. Unless it already is, that is.
     

  4. Barncaster

    Barncaster Poster Extraordinaire

    Hey Mike,
    The enclosure is in post #96 and it's brilliant. What were you thinking?
    Rob
     

  5. jimdkc

    jimdkc Friend of Leo's Silver Supporter

    Age:
    61
    Mar 12, 2009
    Independence, MO
    I intended that the enclosure be left up to the builder.

    I love BluesBlooded's enclosure.

    I had an idea for a minimal, but easy-to-use construction... perhaps I should finish that!
     

  6. mPacT

    mPacT Tele-Holic

    892
    Dec 23, 2014
    Burbank, CA
    It was brilliant. I was thinking of something more like a compact multimeter.
     

  7. Barncaster

    Barncaster Poster Extraordinaire

    But with distended eyeballs?
     

  8. BluesBlooded

    BluesBlooded Friend of Leo's

    I experimented with the different value resistor and got closer to the actual reference magnet value, but the reading swings were all over the place.

    Having a lot of stuff coming up in the next year, I stopped the work on this project.
     
    Last edited: Sep 24, 2017

  9. Barncaster

    Barncaster Poster Extraordinaire

    I'm sure Percy will make another appearance. But perhaps not as a gaussmeter.
     

  10. R. Stratenstein

    R. Stratenstein Doctor of Teleocity Silver Supporter

    Aug 3, 2010
    Loganville, Ga.
    But as what? That is the question.
     

  11. Barncaster

    Barncaster Poster Extraordinaire

    If I had to guess, probably some form of a fuzz....
     

  12. BluesBlooded

    BluesBlooded Friend of Leo's

    Your guess is as good as mine...
     

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