Subject:
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RE: 4.5v upgraded to 9v - ideas welcome.
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 9 Feb 2004 17:57:05 GMT
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Reply-To:
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<rhempel@bmts.%StopSpam%com>
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Viewed:
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1215 times
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> Hany little thing. I'm finding it VERY useful to bring 12 volt DCC down to 9
> volt LEGO without losing torque.
Just remember to limit the current through the Zener diode when dropping
the voltage...
If you have a 12V supply and try to put a 9V zener without a dropping
resistor, it will simply burn out.
A zener diode is really a clamping device. Better to use a standard
780x liear regulator...
Ralph
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Message has 1 Reply:
 | | Re: 4.5v upgraded to 9v - ideas welcome.
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| (...) Well yes, that goes without saying. You need to protect your DCC function output from exceeding it's milliamp limit. With the Zenner it just makes your resistance required to be far less. As an example 50 ohms as apposed to 200 ohms. Dean (20 years ago, 9-Feb-04, to lugnet.trains)
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Message is in Reply To:
| | Re: 4.5v upgraded to 9v - ideas welcome.
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| (...) I've done onboard RCX to modified train motor before. I had it read barcodes along the track to know what station to go to. (URL) motor now powers my DCC CN engine. One thing I would suggest is to get a 4.5 volt Zenner diode and put it in into (...) (20 years ago, 9-Feb-04, to lugnet.trains)
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