I know this is geared more toward VanDeGraaff generators and such, but I was hoping I might get some insight on charging a capacitor. I started out wanting to...
Hi Troy, ... A properly designed voltage multiplier can work quite well for capacitor charging. For example, by using a number of identical lower voltage ...
If you are using a voltage multiplier/adder the output is allready DC at the output. 100kV you must be talking about a Cockroft Walton style adder. If you're...
I guess I should have clarified that, yes I am using a voltage multiplier. I am assuming that it has a standard recovery time. I'll look into that. What I am...
OK, so I put together a system to fire a car ignition coil like a Ruhmkorff coil, and it works well. On one side it uses 2 6 volt lantern batteries to power a...
Very interesting site, but I didn't find anything that answers my question. Reading around I think chokes would work, but I don't know enough about them to...
Please allow me to introduce myself. My name is Dan Petersen and I have recently turned my attention to electrostatics. Not long ago I built a Wimshurst...
Dan, Wrap the lower roller in felt cloth and make a letex belt. Don't use the alcohol on the belt. I have a 22" dome on a 4" clear PVC pipe with a 3" letex...
Hi Dan: Welcome to a great forum. Lots of smart and experienced folks who are willing to share their knowledge. I built two vdgs which I have documented with...
Hi Alan and the group: I have added three more photos of the roller assemblies and my latest Leyden jar in the "Dan's Gizmos" photo area. Thanks for the tips,...
Hello again, What I am doing is taking the HV from these amazing machines, and looking for a sign of "free energy" from the spark. One more pic from another...
Hello Everyone, My name is Darrin and I thought I'd give a VDG attempt after my Friend Dan Petersen built one. It seems I might be having the same issues as ...
Hey again everyone, I have a few more questions that I hope some of you more experienced guys can answer, here we go. Does the width of the belt matter? Will...
Darrin: Think about the VDG being a conveyer system carrying electrons up to the top terminal. Width and belt speed determine the rate of delivery of the ...
Thanks Dick, I do appreciate the assistance. Here are a few more that might help me design a better VDG the next time around. Looking at the Triboelectric...
Hi Darrin Yes you do want 2 materials as far apart as you can get them on the triboelectric series. If you put the positive roller on top de terminal will have...
Darrin: Theoretically you would choose roller materials from the top and bottom of the list however, there may be restrictions involved. For example, teflon is...
Thanks to both Dick and Elmer. You both brought light to a very confusing subject to me and the information you passed is priceless. One other specific...
Darrin: Running a negative top terminal means that the top roller is PVC and the bottom roller is nylon. The bottom brush is ALWAYS connected to ground and the...
Hey Dick, Any clues on the part number for the belting you used? Looked around McMaster-Carr and got lost in a hurry! Found the continious flat belts, but...
Well - good news FINALLY!!! I had gotten a hold of a large rubber-band manufacturer and they sent me some samples. The package I received yesterday had a bunch...
Hi Group: I have posted new photos in "Dan's Gizmos" of my latest endeavour which I call the "Mark-II" (Gosh, what an original name...). :-) I have shortened...
Dan: Congratulations! Well now you know you do not have to have a belt speed of 60mph! My vdg runs that fast to achieve 100 uA charging current. The folks...
Hi Jim and the group: The place I got the bands from is Dykema Rubber Band Company in McKees Rocks, PA. My contact was Mr. Louis McKibben. I hope he won't get...
Hi Dan and everyone: We should keep the chatter on the forum just in case someone might get an idea or two. Regarding polishing the terminal,,,,, I think your...
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