 | | Re: DCC for the RCX —Esger Abbink
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| | | (...) 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 (21 years ago, 28-May-03, to lugnet.robotics.rcx, lugnet.trains)
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| | | | | Re: DCC for the RCX —David Koudys
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| | | | | <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)
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| | | | | | | Re: DCC for the RCX —Esger Abbink
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| | | | | | (...) Hi Dave, no you wouldnt need any resistors or diodes. Esger (21 years ago, 30-May-03, to lugnet.robotics.rcx, lugnet.trains)
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| | | | | Re: DCC for the RCX —James Powell
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| | | | (...) 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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| | | | | | Re: DCC for the RCX —Chris Phillips
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| | | | (...) Huh??!? Your basic resistor can only handle 1/4 watt (0.25W), so your worst-case 2.8W is more than ten times the rated maximum current. Even dumping an "insignificant" 0.5W across a resistor is probably not adviseable unless you are also (...) (21 years ago, 29-May-03, to lugnet.trains, FTX)
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| | | | | | Re: DCC for the RCX —James Powell
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| | | | (...) I don't know about you, but I tend towards .5W or bigger for most of my resistors, and diodes have exactly the same problem if you use them as a voltage drop. Load is not really signifigant on a 5A booster (soon to be 10 amps total...2 (...) (21 years ago, 30-May-03, to lugnet.trains, FTX)
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