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| From | Jeff Layman <Jeff@invalid.invalid> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: Electrostatic actuators to move robots legs... |
| Date | 2024-09-12 11:34 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <vbug36$4imf$1@dont-email.me> (permalink) |
| References | <vbtshm$4pvr$1@solani.org> <vbud7q$6hpt$1@dont-email.me> |
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> -- Jeff
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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
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