Hello All, I’m using Director MX 2004 with SerialXtra x32 to output to a SOM1 serial output relay module. The relay module has an address set up by using a...
I found some inexpensive ($3.50) brushless motors at allelectronics http://www.allelectronics.com/cgi-bin/item/DCM-270/400/12_VDC_BRUSHLESS_MOTOR_.html These...
That is a great motor! A little wire spring pressing up against the shaft shouldn't generate much drag. Many small brush motors have little coil springs for...
Do you have any creative ideas how to set the butterfly on the 0.11" shaft? I killed two dies trying to put a thread on it, it's extremely hard. Guess I'll...
That's always a problem. Here is what I have done in the past: found a brass gear that fits and soldered it to the thing I wanted to spin, drilled out a #2 (or...
Hello. I'm new to the group, and I'm very green on the whole subject matter. However, I have a need to build something before I'll be ready myself. I'm a...
Sorry for the delay in approving the latest members. For some reason, I didn't get email notification that you were waiting. Also, it is easy for me to scroll...
Hi ChHarles. Did you ever get anywhere with the alternative field mill? Eric ... No virus found in this outgoing message. Checked by AVG Free Edition. ...
Not really. I'm restricting myself to designs that would be easy for anyone to build and I just don't like any of the mechanical approaches yet. I just...
I think that is more than wise. I would likely do it and I should know better! ;-} Regarding the rods, this is beyond me technically, but is there any danger...
Yikes! He makes my teenage chemistry experiments look tame. ... No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus...
I need to try that. I have a Zerostat 3 which is basically a sharp needle driven by a piezo voltage source and the thing is amazing. I can actually feel air...
I don't know about the lightning risk. The ionized air should reduce the local potential difference but the ions moving up form a somewhat more conductive...
In Experiments in Meteorology, Leslie Trowbridge has a section on "Measuring Atmospheric Potential Gradien". He constructs a remarkable "science fair" project...
Oh, that's good. A cigarette! Well' I tried a quick experiment with these tungsten rods and the results aren't so hot. I connected a 6" wire to my electrometer...
Are you sure that was a thoriated mantle? (Hard to find these days.) I had one of those piezo static removal things back in the days of vinyl, you're right,...
Are you sure that was a thoriated mantle? (Hard to find these days.) I had one of those piezo static removal things back in the days of vinyl, you're right,...
Folks, I've been following this thread with interest, as I used to monitor the atmospheric charge when I was a boy with a vacuum tube electrometer... The...
I have been thinking about the "sharp needle" discharge idea. It would seem the trick would be to use an AC voltage to produce a balance of + and - ions. The...
This is an off the wall idea for a homemade electrometer that occured to me. Stretch a thin aluminized mylar film over a metal loop frame and mount it close to...
Yes, they are pretty hot and will drive my sensitive ion chamber to 1/3 scale on its third scale! I bought those at Wallmart back when I did the first ion...
I'm going to have to think about the water idea. At least that is rain proof! ... the ... electrometer... ... Scientist" has ... methods of ... various ... of ...
Once I pointed my ion gun at the electrometer from several feet away I realized that placing a high voltage needle right next to the electrometer input might...
This one, although fascinating, has the problem so many others have and that's the weather. It isn't going to like wind, rain and hail very much, not to...
I just had a funny idea. How about a lit Coleman lantern with a thoriated mantle with the glass shield removed? I suppose the radioactive mantle would be...
http://users.theramp.net/~sferics/ follow the link under Sky-shine Color Components and Atmospheric Ion-currentAnd then schematics. ... just a needle and a...
