Subject:
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Re: Idea for a track power pickup for non motored trains...
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 12 Feb 2004 22:18:07 GMT
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Viewed:
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2184 times
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In lugnet.trains, Gustavo Brinck wrote:
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In lugnet.trains, Mark Riley wrote:
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In lugnet.trains, Gustavo Brinck wrote:
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Photos of the first stage
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=71993
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Very nice! Do you get a lot of flicker in the LED as the car rolls along? I
suppose you could do two wheels on each side to minimize flicker...
Mark
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Yes the LED flickers, a little, and I will do the same with the others wheels,
it works and is very cheap. I need to work to improve the electric contact,
maybe this weekend
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With my CN engine I found it necessary to put a capacitor across the leads to
smooth out the flicker. It worked quite well. I used the kind of cap that didn’t
have a pos or neg. it could be used both ways.
This worked pretty good for standard DC usage. For DCC you can just use a 740ohm
directly to the LED from the function output. (from what I can see, the DH163D
decoder from Digitrax filters the output. I don’t get any flicker with just a
resistor and the LED)
One point to note however. LED’s do not like hi reverse voltage for very long.
Here are a couple of links that I have found useful.
Electronic Circuits for the Hobbyist
http://www.meridianelectronics.ca/circ/circuits.htm
LEDs 101
http://members.misty.com/don/ledd.html
Dean
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