Re: Electrostatic actuators to move robots legs...

Subject	Re: Electrostatic actuators to move robots legs...
Newsgroups	sci.electronics.design
References	<vbtshm$4pvr$1@solani.org> <vbud7q$6hpt$1@dont-email.me> <vbug36$4imf$1@dont-email.me> <vbuneq$8hap$1@dont-email.me> <vc0g8c$3dsu$1@solani.org>
From	Chris Jones <lugnut808@spam.yahoo.com>
Message-ID	<jSUEO.167440$QvZa.5887@fx08.ams4> (permalink)
Organization	usenet-news.net
Date	2024-09-13 20:55 +1000

Show all headers | View raw

On 13/09/2024 2:49 pm, Jan Panteltje wrote:
> 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.
> 

Kicad and web browsers are quite useful, even if the physics is of no 
interest to you.

Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-12 05:00 +0000
  Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-12 09:45 +0000
    Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-12 10:27 +0000
    Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-12 11:34 +0100
      Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-12 14:43 +0200
        Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 04:49 +0000
          Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 12:14 +0200
            Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 11:57 +0000
              Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 21:07 +0200
          Re: Electrostatic actuators to move robots legs... Chris Jones <lugnut808@spam.yahoo.com> - 2024-09-13 20:55 +1000
            Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-13 11:38 +0000
              Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-13 20:40 +0200
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-14 05:55 +0000
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-14 13:17 +0000
                Re: Electrostatic actuators to move robots legs... liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-09-14 18:46 +0100
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-14 19:20 +0000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-14 19:49 -0700
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 08:13 +0100
                Re: Electrostatic actuators to move robots legs... Cursitor Doom <cd999666@notformail.com> - 2024-09-15 09:58 +0000
                Re: Electrostatic actuators to move robots legs... liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2024-09-15 11:21 +0100
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-15 11:00 +0000
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 11:38 +0100
                Re: Electrostatic actuators to move robots legs... Nick Hayward <nhayward8990@protonmail.com> - 2024-09-15 17:12 +0000
                Re: Electrostatic actuators to move robots legs... Jeff Layman <Jeff@invalid.invalid> - 2024-09-15 19:10 +0100
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-15 12:21 -0700
                Re: Electrostatic actuators to move robots legs... Bill Sloman <bill.sloman@ieee.org> - 2024-09-16 18:03 +1000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-15 12:11 -0700
                Re: Electrostatic actuators to move robots legs... Bill Sloman <bill.sloman@ieee.org> - 2024-09-16 17:54 +1000
                Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-14 19:50 +0200
                Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-15 05:51 +0000
                Re: Electrostatic actuators to move robots legs... john larkin <JL@gct.com> - 2024-09-14 11:21 -0700
                Re: Electrostatic actuators to move robots legs... Jeroen Belleman <jeroen@nospam.please> - 2024-09-14 21:49 +0200
                Re: Electrostatic actuators to move robots legs... Joe Gwinn <joegwinn@comcast.net> - 2024-09-15 18:41 -0400
    Re: Electrostatic actuators to move robots legs... Jasen Betts <usenet@revmaps.no-ip.org> - 2024-09-18 05:33 +0000
  Re: Electrostatic actuators to move robots legs... john larkin <jl@650pot.com> - 2024-09-13 12:56 -0700
    Re: Electrostatic actuators to move robots legs... Jan Panteltje <alien@comet.invalid> - 2024-09-14 05:56 +0000

csiph-web