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Old 23rd May 2013, 07:36 PM   #71
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Yeah, I've done that with a few girls in the studio before, you know, when they look bored...
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Old 23rd May 2013, 08:52 PM   #72
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Come to think of it, this is even stranger than I thought.

I don't know how to Google this and I never thought about it before, but there is a fundamentally different kind of electron flow going on than in normal conductors. No free electrons here. The transport must be ionic.

I would never have guessed that the propagation speed in ionic transport would be high enough for audio, altough I am sure someone must have measured it sometime.

P.s. with DC on the signal you might create your own oxigen, always a healthy combination with fruit.

Edit: what I mean with propagation speed is that two electro-chemical reactions need to take place at both cathode and anode, the electrons flow through the circuit, this goes fast enough :-)

Last edited by vacuphile; 23rd May 2013 at 08:59 PM.
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Old 23rd May 2013, 08:57 PM   #73
Pano is offline Pano  United States
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tried passing a signal thru a pencil lead. no luck peanut butter didn't work, either
although a signal did pass thru several women in the shop, I'm pretty sure none were virgins
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Old 23rd May 2013, 09:22 PM   #74
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Quote:
Originally Posted by Pano View Post
tried passing a signal thru a pencil lead. no luck
That makes me wonder if your method has serious faults somewhere. A pencil lead is a quite good conductor, far better than needed to pass a small, high-impedance signal.

Can you post a schematic/drawing of the overall circuit you are using?

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Old 23rd May 2013, 09:38 PM   #75
DF96 is offline DF96  England
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You could make a volume control with pencils.
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Old 23rd May 2013, 10:27 PM   #76
Pano is offline Pano  United States
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Well the carpenter's pencil I used did not work. I may try again with another pencil.
En attendant a schematic, here is a quick photo.
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File Type: jpg banana-man.jpg (54.9 KB, 266 views)
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Old 23rd May 2013, 10:51 PM   #77
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Most impressive that it is though the skin as well (of the fruit and potato, not to mention yours)!! I know that from playing around with the scope that I am great at picking up 50Hz, but I'm a terrible conductor not sure if an audio signal will pass though me unscathed

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Last edited by wintermute; 23rd May 2013 at 10:52 PM. Reason: minor typos
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Old 23rd May 2013, 10:55 PM   #78
Pano is offline Pano  United States
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Here is the basic concept. It's very simple.
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File Type: png potato_schematic.png (5.2 KB, 256 views)
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Old 23rd May 2013, 10:58 PM   #79
Pano is offline Pano  United States
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Tony, there is a good bit of attenuation, banana and human much more than the potato.
But I think the input impedance of the circuit we used today is 10K. You gotta expect some attenuation.

I also sent video thru the potato, but that was much more difficult.
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Old 24th May 2013, 09:11 AM   #80
AndrewT is offline AndrewT  Scotland
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I had my year 7 classes doing that experiment.
Turning on the LED indicator in a soil moisture tester, using a human chain that they extended to 20 pupils standing in a big circle touching index finger tip to tip.
I never checked whether Pinkie tip to tip or Thumb tip to tip changed the bass response of the soil moisture tester.
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