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Not sure about Circuitron. LogicRail has a neat system as does Signal Solutions (the "Cadillac" as Model Railroader calls it) and Bruce Chubb's C/MRI. Main thing to consider is how you want it to work with your control system. As I see it, traffic lights (I'm guessing you mean crossing signals) can work together but it has to use the same logic. At least as I understand it. If you mean actual traffic signals, then who cares? Let it run on it's own. Just the traffic signals.
I totally agree with the distance between feeders as the above posts indicated. I should mention that feeders should be 20 guage and buses 14 guage wire. If the distance to a feeder is shorter then use 16 or 18 guage. Try to keep the 20 guage wire to 1 foot, 18 AWG to 8 feet, and 16 AWG to 12 feet. 14 guage can go as far as 30 feet. These distance numbers are on the low side but make a good base. BTW, PSX circuit breakers recommend 14 AWG to avoid false shorts. -Aksel
I rebuilt the circuit, must've done something wrong. Circuit works as advertised. Thanks for the input anyway. Aksel
The circuit is meant to operate like a wall switch that glows when the room light is off. When the pushbutton is pressed power is restored to the track and the LED goes out. Presumably the LED should light to indicate a locamotive has reached the isolated track of a switch lead. I drew the circuit in Word but something wont let me paste it here. Aksel
Here is a feeble atempt to draw the circuit. Hope it makes sense. The resistors are rated at 1/2 Watt. The arrows show diode polarity. Due to size constraints the isolated track should be on the other side of the pushbutton. DCC SYSTEM--------------I------------------- NORMALLY OFF ----------------------I------------ISOLATED TRACK I PUSHBUTTON I 1K OHM I RESISTOR I I---------I-------- 1K OHM RESISTOR -----------I I I--------------- LED I>I------------------I-----I--------I I--------I<I 1N4001
Randy, Thanks for the response. There are two resistors in the circuit, both 1K ohm. One in series the other in parallel to the LED and diode. The original LED was .23mA. These should have been enough. Have not tried a bi-polar. Aksel
On page 41 of The DCC Guide by Don Fiehmann there is a circuit diagram to use a push button for powering staging tracks. I made one of these and it works like a champ powering the track but the LED doesn't work. I used a 2.5V LED, should it be a 12V? I hooked the "Rail A" side to the circuit, is the schematic incorrect and both sides need to be wired to the circuit? If so, how? The only thing I have tried thus far is reversing the polarity of the LED. Any help would be appreciated.