FWIW: A fellow at work tells me that *floppy disk material* has high enough sheet resistance to be used to fashion giga-ohm resistors. Presumably this is due ...
... Try cassette tape. Hang two long pieces from the terminals of a taser gun(s) and see if they can be made to attract or repel over their entire length....
Today I got to visit an experimental reactor. (location withheld for security reasons). I stood looking down into the 27 foot deep pool of de-ionized water and...
... Anyone know of a source for some glass encapsulated high value resistors that can stand up to a few KV or so? The victoreen's that I can find are all only...
Way cool, sir. Your use of an IC as 'mask' is distracting, a key or dead fish or birdshot-hand would be more traditional. But the variac & transformer & tube...
... I ... If silicone or epoxy is ok, Digikey & Mouser stock ohmites up to 1000M & 1500M, respectively, and at voltage ratings up to 20kv (digikey erroneously...
... Nice auction! Sorry, when I said high value, I meant in the 10 to 100 G ohm range ;-) The seller does have a lot of nice HV items for sale though... -- ......
Rocket Scientist guys/gals... Thanks for whomever had that cool tip about using video tape as a film resistor! I had just chopped about 10 minutes of *@%!$%...
Everyone needs to remember that since "resistance" is not a specified property of magnetic tape, different make/type of cassettes need to be tested for that...
Does anyone have a datasheet for the glass encapsulated victoreen resistors? What is their max voltage? I've seen conflicting values. -- ... Chris Smolinski ...
And, Craig... not to forget that a resistor made of tape will be noisy. Very, very noisy due to many current peaks and dips. The conductive particles aren't in...
I have used pencil "lead" as the core for some of my various homemade resistors and they are durable, non-degradable, and able to handle a lot of voltage and...
Oh yes, very true John. Also, moisture absorption can cause resistance changes with changing humidity. Try spraying the oxide side with some type of acrylic...
Has anyone experimented with other naturally occurring crystals as makeshift resistors? Some minerals are almost pure insulators, but the range in resistivity...
... <snip> ... Not true. VHS tape runs with the oxide layer against the heads just as audio tape does. That's why the video heads get clogged so easily. ...
... I do believe you are correct. I was running on memory from 20 years ago. NOT a reliable source of information. Just remembering my physics of mag...
... specified ... be ... Yes; however certain designs (eg a voltage divider) will always divide voltage regardless of the absolute resistance, so long as the...
... homemade ... a lot ... At work we have 'chicken sticks' that look like scaled up corn-cob holders. they are pieces of PVC with copper nails out one end,...
FWIW I just took apart an audio tape and the inside surface of the plastic liner has nice resistive properties, on the order of 100 kOhms for a 2mm gap. This...
... Yessir, that's true. Coming from the ex anthracite region of PA, I can tell you that the highest grade of anthracite coal, very glassy and brilliant, came...
... Good point about the resistance ratio being unaffected by the absolute resistance/length. I can even see a variable high voltage divider made from such...
//snip// ... Sigh. <weeping, weeping> Thanks, Craig, see what you've done? Where's that damn box o' Kleenex? Sniff. But, alas, you're right. I remember the...
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