Subject:
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Re: LEGO Electro-magnet
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 19 Apr 2001 17:07:59 GMT
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Viewed:
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2601 times
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In lugnet.robotics, Philippe Hurbain writes:
> There is a description of a magnet actuator at Andreas Peter's site:
> http://www.inchlab.com/ (see Elect.Actuator)
> But two modifications IMHO are needed to this design :
> - Use heavier duty diodes than 1N4148 indicated in Andreas shematics. 1N4148
> is rated 20mA and is probably fried by now... I'd use cheap 1N400x (4001 to
> 4007) 1000 mA diodes for that.
> - use another 1N400x connected in series to prevent reverse connection.
>
> Philo
>
> http://www.philohome.com
Hi Philippe,
you're right, but you don't need this flyback diode, as Philip Taylor mentioned
here : http://news.lugnet.com/robotics/?n=15158
Because you don't need a flyback diode, you also don't a diode in series.
Rainer
P.S.: I had the same ideas than you mentioned above ;-)
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Message has 1 Reply:
 | | Re: LEGO Electro-magnet
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| Hello Rainer, True! But simplicity sometimes takes a long time to be acheived ;) But there may be some use in flyback and series diodes: Andreas says that his magnet consumes 9mA, below what is available through sensor ports in active mode. So a (...) (25 years ago, 20-Apr-01, to lugnet.robotics)
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Message is in Reply To:
| | Re: LEGO Electro-magnet
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| There is a description of a magnet actuator at Andreas Peter's site: (URL) (see Elect.Actuator) But two modifications IMHO are needed to this design : - Use heavier duty diodes than 1N4148 indicated in Andreas shematics. 1N4148 is rated 20mA and is (...) (25 years ago, 19-Apr-01, to lugnet.robotics)
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