Subject:
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Re: Does anyone know how to modify a train controler?
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 22 Oct 2001 19:27:54 GMT
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Reply-To:
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cmasi@cmasi.chem.tulane.^AvoidSpam^edu
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Viewed:
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876 times
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Dean Husby wrote:
>
> Rick Clark wrote:
> >
> > I've also used this solution for some switching setups, and found it quite
> > useful. I can answer some questions, but the cost is that I'll ask a new one.
> >
> > No explosions, the motors work fine at 12v. I've even taken one up to 14v with
> > no ill effects, but I'm sure that continued usage would severely shorten the
> > life of the motor. And yes, the 12v setting will power the 12v light bricks
> > (as will the 9v), but in either case, you gotta find a way to make the
> > connectors compatible. The easiest way, I think, is to get a 12v wire, unscrew
> > the connectors, and separate them from the wire. Then take a 9v wire, cut it
> > in half, strip and tin the ends, and screw them into the 12v connectors. Now
> > you have two 9v to 12v connectors. Seems to work great!
> >
> > So here's my question: When I set the switch on the multi-voltage unit to
> > 7.5v, the LEGO speed regulator seems to only have about 3 speed settings, the
> > fastest of which is about half speed, and the slowest of which isn't really
> > even strong enough to overcome friction in the motor. So, electronics experts,
> > how come 7.5v doesn't give me 9 gradients of speed that are ~20% slower than
> > 9v (7.5 ~=~ 80% of 9) ?
>
> I think you've missed the point slightly.
>
> We are talking about 9 volt controllers and power supplies to the unit.
> The STANDARD power supply for the 9 volt controllers is 12 VOLTS AC! It
> turns it into DC 9 VOLTS inside the unit.
>
> When your using the less then 12 volts mode you're STILL taking the 3
> volt hit inside and the end result is a lowered total output.
>
> In your example, 7.5 volts is aprox 5 volts. That's not much for the
> train. It could degrade even more at low voltages. I'm not sure. I
> haven't had a chance to try it yet.
>
> Dean
> --
> Dean Husby
> LUGNET Member #320
> TFM's LEGO Workshop - http://www.akasa.bc.ca/tfm
> The Vancouver LEGO Club - http://www.akasa.bc.ca/vlc/
Also, the voltages that are output in the 6 steps do not increase linearly.
One might think that the settings (based on 9v max) are 1.5, 3, 4.5, 6, 7.5, and
9, but they aren't. I cannot remember where the scale starts on the speed
controller, but I think it is around 3V. Below that setting (3V?), there just
isn't enough juice to get the motor moving.
Chris
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Does anyone know how to modify a train controler?
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| (...) I think you've missed the point slightly. We are talking about 9 volt controllers and power supplies to the unit. The STANDARD power supply for the 9 volt controllers is 12 VOLTS AC! It turns it into DC 9 VOLTS inside the unit. When your using (...) (23 years ago, 22-Oct-01, to lugnet.trains)
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