Subject:
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Modified Transformers Question (Re was: Transformer Power)
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 18 Jul 2005 14:40:10 GMT
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Viewed:
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1992 times
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In lugnet.trains, John Barnes wrote:
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- Heavier version of the LM317 regulator IC in TO-3 housing (should do at
- version)
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Check the Linear Tech LT1083/4/5 series. They are pin compatible with the part
that is already in the controller.
LUCNY uses some of my modified controllers. You need to change;
The bridge rectifer diodes to handle the chosen maximum current
The smoothing capacitor as the ripple voltage will be higher at higher current
and “dip” into your output voltage.
The heatsinking. (I fabricated a multi-fin heatsink with a tiny 1” fan to keep
it cool.
We’ve used these controllers for three years without serious reliability
problems.
One let go at Brickfest two years ago and surprisingly it was one of the 5A
bridge diodes that popped.
JB
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John,
We had the luxury of using your controllers at the NMRA show (Thanks a ton!),
and I am interested in modifiying my own. I think I’ve got enough information to
swap the internal components, but negelected to look at the wallwart (power
adapter) that replaced the LEGO one.
Will a 12V 3Amp adapter work, or should the voltage stay at 9V?
Thanks in advance.
-Jeramy
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Message has 2 Replies:
Message is in Reply To:
 | | Re: Transformer Power
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| (...) Check the Linear Tech LT1083/4/5 series. They are pin compatible with the part that is already in the controller. LUCNY uses some of my modified controllers. You need to change; The bridge rectifer diodes to handle the chosen maximum current (...) (20 years ago, 5-Jan-05, to lugnet.trains)
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