Sujet : Re: Circuit Symbol
De : pcdhSpamMeSenseless (at) *nospam* electrooptical.net (Phil Hobbs)
Groupes : sci.electronics.designDate : 19. Dec 2024, 21:38:33
Autres entêtes
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john larkin <
JL@gct.com> wrote:
On Thu, 19 Dec 2024 09:09:54 -0600, Dennis <dennis@none.none> wrote:
On 12/18/24 21:20, john larkin wrote:
I vaguely recall that they oscillated at somethig over 100 Hz. I
powered an old car radio with 60 Hz instead of the vibrator, and the
radio's step-up transformer ran hot.
They ran at a frequency as high as reasonable for a mechanical device.
This allowed for a smaller transformer.
Vibrating contacts were the first switching regulators. Auto
generators - before alternators - used a hysteretic oscillating
contact closure to drive the field coil. That was very efficient and
not especially reliable.
Especially when made by Lucas.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC /Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics 
Circuit Symbol
Re: Circuit Symbol