Subject:
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Re: Pneumatic Solenoid Valve Interest Poll
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 4 Feb 2000 22:41:39 GMT
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Original-From:
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Pete Sevcik <sevcik@flash.net^stopspam^>
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Viewed:
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1816 times
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> The better model railway ('railroad') point ('turnout' or 'switch') controllers
> use
> a largish capacitor to drive their solenoids.
A variation on the capacitor idea is to put a large non-polarized capacitor in
series with the solenoid. Put a diode in parallel with the capacitor. Apply
reverse output to charge up the capacitor, then apply forward output. This will
initially double the voltage applied to the solenoid. As the capicator discharges
to 0.7 volts, current will start to flow through the diode.
--
Pete Sevcik sevcik@flash.net
Techno-stuff Robotics
http://www.flash.net/~sevcik/
Robotics for FUN !
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Message is in Reply To:
 | | Re: Pneumatic Solenoid Valve Interest Poll
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| The better model railway ('railroad') point ('turnout' or 'switch') controllers use a largish capacitor to drive their solenoids. This has several benefits: it provides a high voltage/current to drive the solenoid and it isolates the solenoids (...) (25 years ago, 4-Feb-00, to lugnet.robotics)
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