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  • -insertnamehere- commented on AndresR145's instructable E-Field Mill5 months ago
    E-Field Mill

    Awesome! Thanks for such an in-depth answer. That all makes sense. I'll start ordering parts today. It may take me a while to put it all together, but I'll keep you posted! I'm hoping I'll be able to calibrate it as well so that I can have a dimensional number, but we'll see...I'll need to buy a real power supply for that!One last thing: A lot of DIY and commerical field mills I have seen all have grounded shielding on all sides. Your design appears to just have the shield on the top covering half the spinning plate. I'm assuming it doesn't really matter too much though, as the field mill will still be measuring the total electric field perpendicular to the plates, right?

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  • -insertnamehere- commented on AndresR145's instructable E-Field Mill5 months ago
    E-Field Mill

    Really a brilliant design! This is the first one I've seen online that appears within my abilities to build. Thanks so much for sharing!I have a couple questions...Please excuse my rudimentary electrical engineering knowledge:1) I see your insight below on motor RPM, and all of the 6V capstan motors I see on Ebay are listed as 2400RPM motors. DO you think one of those would work?2) Does the charge collecting capacitor need to be a polystyrene capacitor? 3) When you say the capacitance of this capacitor can be changed, how much is the tolerance?4) I'm having trouble finding "conductive rubber tubing" for a reasonable price. (I'm assuming this is carbon filled silicone? Let me know if you have any good ideas on sourcing this material.Again, Thanks so much! I've been wanting to b...

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    Really a brilliant design! This is the first one I've seen online that appears within my abilities to build. Thanks so much for sharing!I have a couple questions...Please excuse my rudimentary electrical engineering knowledge:1) I see your insight below on motor RPM, and all of the 6V capstan motors I see on Ebay are listed as 2400RPM motors. DO you think one of those would work?2) Does the charge collecting capacitor need to be a polystyrene capacitor? 3) When you say the capacitance of this capacitor can be changed, how much is the tolerance?4) I'm having trouble finding "conductive rubber tubing" for a reasonable price. (I'm assuming this is carbon filled silicone? Let me know if you have any good ideas on sourcing this material.Again, Thanks so much! I've been wanting to build one of these for years...with these plans, I'm hoping to measure the electric field underneath some thunderstorms this summer! :)

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  • Arduino Uno Wireless Weather Station   (Wunderground.com)

    Hi There! Thanks for the incredible instructable.I'm working on a remote weather station that will use a GSM cell module to send data to wunderground. Do you have an estimate of how much data each update uses? I want to figure out what kind of refresh rate would be usable and affordable over the cellular network.Thanks!

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