 | | Train Depot DCC Update
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I have made some progress with TDDCC and have successfully installed an MRC ADC330 N-scale decoder inside a LEGO motor. (URL) under projects (sorry no pics yet) I have a question though. Inside the LEGO motor unit is a tiny disc between the one (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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I am sure it has a purpose and unless you know what it is you won't know whether it's safe to leave out or not. Manufacturing nowadays doesn't typically put stuff in that's not needed, need to save those pennies. My guesses: capacitator (but if this (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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(...) Unless it's just for FCC in which case can rip it out ;) (...) I measured its resistance, it has none. So it's no capacitor. (...) Could be, although it's hard to see how. A conductor with 1/4" diameter could carry a few hundred amps! But (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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(...) Larry Pieniazek responded: (...) OK, here's my guess. It's a polymer thermal resistive protection device. Put it in circuit, and turn up the power...basically, no resistance. Now, with the power up, try to stop the wheels. This would increase (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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Hmmm, that's a jolly fine theory, I didn't know such a material existed. Maybe I need to go back and figure out a way to incorporate the disc into the modified motor[1]. It would be kind of embarassing if my motor fell out onto the track one day (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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(...) Didn't open a motor yet but with the description I would say that it is a thermistor (thermal resistive device). Better find a way to live it in place. (...) When I opened my controller I didn't saw (or remember seeing) such a device inside (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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(...) I suppose I could try soldering wires to it and thereby put it between the DCC decoder output and the motor. Does it need to be thermally coupled to the motor though or is the heat of the current passing through it sufficient? Matt (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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(...) Hard to say, some are able to heat by themself and some need external heat source, but the first type normaly stay "open" as long as there is power applied to them while the second type slowly became less resistive when they cool down, so if (...) (26 years ago, 15-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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Soete Ludo wrote: Hi, I read your answer to Matt Bates concerning the lego train motor. It's so that if you overload the speed regulator that the voltage will drop down due to an internal cirquit into the voltage regulator. This is a LM317 and (...) (26 years ago, 16-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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<snip every thing> After opening my first lego motor, I took a look at that rounded part. Just with my technical knowledge (didn't perform anytest on it) I defenetivly say it is a thermistor and it doesn't have to be heated by the motor, just the (...) (26 years ago, 16-Mar-99, to lugnet.trains)
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| | Re: Train Depot DCC Update
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Three mile Island train theme SteveB Matthew Bates wrote in message ... (...) Maybe (...) onto (...) from (...) tab (...) (26 years ago, 17-Mar-99, to lugnet.trains)
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