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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Electrostatic actuators to move robots legs...
Date: Fri, 13 Sep 2024 04:49:16 GMT
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On a sunny day (Thu, 12 Sep 2024 14:43:02 +0200) it happened Jeroen Belleman
<jeroen@nospam.please> wrote in <vbuneq$8hap$1@dont-email.me>:

>On 9/12/24 12:34, Jeff Layman wrote:
>> On 12/09/2024 10:45, Cursitor Doom wrote:
>>> On Thu, 12 Sep 2024 05:00:38 GMT, Jan Panteltje wrote:
>>>
>>>> Artificial muscles propel a robotic leg to walk and jump:
>>>>   https://www.sciencedaily.com/releases/2024/09/240909113111.htm
>>>>
>>>> quote:
>>>>   "
>>>>   The actuators are oil-filled plastic bags, similar to those used to
>>>>   make ice cubes.
>>>>   About half of each bag is coated on either side with a black electrode
>>>>   made of a conductive material.
>>>>   Buchner explains that "as soon as we apply a voltage to the 
>>>> electrodes,
>>>>   they are attracted to each other due to static electricity.
>>>>   ...
>>>>   "
>>>> And press the fluid out....
>>>> So electrostatic actuators!
>>>
>>> How does that not violate thermodynamics? You seem to be getting useful
>>> power from zero energy.
>> 
>> How do little pieces of paper defy gravity when you put a charged comb 
>> near them? Isn't the energy supplied by rubbing the comb against some 
>> material to give it the charge to attract the paper? Where does the 
>> voltage come from which is applied to the bag electrodes?
>> 
>> Didn't we discuss something like this not too long ago, or was it in 
>> another NG?
>> <https://en.wikipedia.org/wiki/Electrostatic_motor>
>> 
>
>That was right here in s.e.d in July. And no, thermodynamics, or
>rather conservation of energy is not violated. It never is.
>
>I don't think that they can get useful amounts of work out of these
>things. The Science Daily article is useless, as always, and I did
>not bother to read the paper.
>
>Jeroen Belleman

At least they made something that works,
unlike the trillions spend at CERN that never do anything for anybody.
I would cancel all funding to CERN if they did not come up with something revolutionary and practical useful in a year.
He who does not want to see is practically blind.