Subject:
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Re: Any interest in high amp. Train controllers?
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 4 Mar 2008 23:09:50 GMT
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Viewed:
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15516 times
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I was poking around looking at LM317 specs and can't seem to find the Max Vin.
What's the max Vin we can plug into the controller... I see old laptop "wall
warts" and inline "bricks" getting tossed all the time here at work. If this
alone helps the controllers provide a more constant Vout I'd love to reclaim
some of these power supplies and use them to juice the controllers!
SteveB
> I also picked up some laptop style power blocks that are rated at 12v 3+ amps.
> This allows the controller to run at over 2 amps continuously. We have several
> trains in the club that have 3 or more motors. There's also a 5 amp version of
> the LM350. I've built on controller with this, and am adding PWM to this as
> well.
>
> Mat Clayson
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Message has 3 Replies:
 | | Re: Any interest in high amp. Train controllers?
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| (...) I haven't worked with one in a while, but I know it'll take at least 36v in, and the limit on power is basically whatever you can handle as far as heat dissipation. So if you get the one in the big transistor-body package (TO-3, I think?) and (...) (17 years ago, 4-Mar-08, to lugnet.trains)
| | | Re: Any interest in high amp. Train controllers?
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| (...) The LM317 is made by a bunch of different manufacturers, so there's some variation. But the original maximum suggested input is 35V or 32V between input and output. But as I mentioned before, the difference between input voltage and output (...) (17 years ago, 5-Mar-08, to lugnet.trains)
| | | Re: Any interest in high amp. Train controllers?
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| (...) Steve- National gives the Absolute Maximum Value for Vin for the LM317 at 40V, but why would you want to run that high for a load that's supposed to be limited to 9V? You would waste of the extra power dissipation of the bigger device and get (...) (17 years ago, 5-Mar-08, to lugnet.trains)
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