ESD Detector for $2!

Presentteck · Apr 6, 2013

benmwv said:
You would have to use an n channel and a p channel if you wanted to measure the positive and negative.

Oh, i think i know where i thought wrong now.

As for the meter meaning anything, yeah I know... I just like analogue meters.
also you could have a line of led's that light up like an EQ bar

phenol · Apr 6, 2013

you can still use a centered meter with n- channel jfet as shown here. the channel can be depleted or enhanced and the meter will respond accordingly. i googled this image, so there must be a description somewhere along with it, but i think it is self-explanatory.

Presentteck · Apr 6, 2013

And one reverse image search later I get these sites ( Thanks tineye

)

the first link seems the best just glancing over it, but they're mostly just coppied and pasted from one to the other... its sleep time lol
http://www.zen22142.zen.co.uk/Circuits/Misc/staticdet.htm
http://www.circuit-finder.com/categ.../405/static-electricity-negative-ion-detector

Cyparagon · Apr 14, 2013

Sigurthr said:
[magnetic] fields are only present where there is a current flow.

Suddenly, a magnet :na:

Sigurthr · Apr 14, 2013

Hehe, botched post is botched. I thought it best to leave it there unedited/corrected as it would have made the following post regarding it make no sense if removed =P.

Kookapeli · Jul 14, 2013

I got myself one of THESE I get static shocks off light switches, elevator buttons etc, since i used thaat, no more shocks

Tw15t3r · Jul 15, 2013

I made one for myself using a depleted pen ink, 4x 100k ohm resistors, aluminium foil, and tape (double sided). Very handy indeed, especially during winter.

I had no idea these stuff were actually being sold though!

ESD Detector for $2!

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