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I'll check on this... might be pretty simple. James J. Trobaugh <james@ngltc.org> wrote in message news:Gzv5J5.9GH@lugnet.com... (...) the (...) the (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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Just remember to add a resistor in serie with the variable resistor, so the total value never reaches 0. Something like 4k7 + 22k variable resistor... ? Steve Barile <steve.e.barile@intel.com> wrote in message news:GzvKFx.8Fo@lugnet.com... (...) (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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Larry Pieniazek <lpieniazek@mercator.com> wrote in message news:Gzw31E.5z6@lugnet.com... (...) it (...) love (...) I'll think about it. Check tomorrow. (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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(...) You probably used one with regular diodes, where each diode gives a 0.7 voltage drop, which is standard. You could try Skottky diodes which IIRC give a 0.3 voltage drop each, leaving you with 8.4v. Other way would be to use some transistors (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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(...) Try this link if you can't find it (URL) thought this was quite interesting but the background, while neat, made it very very hard to read. I think this is important information and would love to see it repackaged in a way that made it (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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It would nice if we could just reverse some of the circuit instead of having to use a rectifier (something about that word makes me laugh). Nice tag line Rob. jt (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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We have been experimenting with an external bridge rectifier for our Rail Racer events. The only drawback is that the one we picked out (lack of electronics experience) draws 1.5 volts away from the output going to the track. Not a big fairness (...) (22 years ago, 27-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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I haven't looked at the schematic, but would it be possible to add some type of rectifier in there? (I'm not an electrical engineer, but I remember something about a rectifier allowing current to pass "one way"... And I think I know exactly what (...) (22 years ago, 26-Jul-02, to lugnet.trains)
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| | Re: New page about #4548 Train Controller.
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I have been intesrted in this topic as well. Thanks for doing the schematic work. I was thinking about about mounting a linear variable resistor aka Thumbwheel Trim Pot (see: (URL) on the PCB board opposite the power connector. (see: (URL) 1st (...) (22 years ago, 26-Jul-02, to lugnet.trains)
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| | Re: Rare brick models
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(...) Well, technically Oakham was part of the LNER so you could still have a go. Oh, hang on - don't anyone tell that to the Swindon Steam Museaum! Jason J Railton (22 years ago, 26-Jul-02, to lugnet.trains)
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