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> > PLMKWYT,
> >
> > Mark
>
> Oh My Goodness! This is what I've been waiting for--when I priced out DCC
> controllers, they were 200+ CDN...
>
> If I can get one of my many RCX's to do it, well that's entirely another matter.
>
> When I originally did the research and found the cost to be a little high, I
> noticed that on (I think Todd's page) that there were capacitors and resistors
> installed in teh LEGO train motor--the resistors to make sure that only 9v goes
> to the power connector on the top of the motor, since most DCC controllers run
> at 12 volts. The capacitors were installed to decrease the 'buzzing' of the
> motor at low speeds.
>
> Now since hte RCX runs at 9v anyway, the resistor, as far as I understand, isn't
> needed--the power output will already be at 9v.
>
> What about the capacitors in the motor? will they still be needed to reduce the
> motor cycling 'buzzing' at low speeds?
>
> I'm going to my local hobby shop this weekend (hopefully) and get me some of
> those circuits!
>
> Dave K
As I run 12v stuff I dont know the 9v motor good enough to comment on the
capacitors but I dont think it's that good an idea to use a resistor to drop the
voltage. Use one or more (zener)diode's instead.
Esger
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Message has 2 Replies:
 | | Re: DCC for the RCX
|
| <snip> (...) Hey Esger I'm not an electronic specialist by any stretch of the imagination (though not by lack of trying) But commercially available DCC controllers and stuff mostly run at 12 volts (from the research I read), but the RCX runs at 9 (...) (21 years ago, 28-May-03, to lugnet.robotics.rcx, lugnet.trains)
| | | Re: DCC for the RCX
|
| (...) Resistors work fine due to the relative difference in cost. The accessory outputs of the earlier decoders are 100ma or so @28V or less, so at most you are dealing with 2.8 w loss (or 100 ma current draw). In order to drop from 14V to 9V, you (...) (21 years ago, 29-May-03, to lugnet.trains)
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Message is in Reply To:
| | Re: DCC for the RCX
|
| (...) Oh My Goodness! This is what I've been waiting for--when I priced out DCC controllers, they were 200+ CDN... If I can get one of my many RCX's to do it, well that's entirely another matter. When I originally did the research and found the cost (...) (21 years ago, 28-May-03, to lugnet.robotics.rcx, lugnet.trains)
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