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Reply to "Contactor alternative"

@ADCX Rob posted:

Here is the basic diagram for using the insulated rail to provide track power and switched common/ground to the triggered accessory. To use fixed voltage, disconnect the wire from lockon clip 1 and connect to your selected accessory voltage post on your transformer.


Basic Insulated Track Section

The Bob Nelson method for two-light signals using an extra bulb is fairly straight forward except for the signal bridge which requires isolating the heads from the bridge so the common is not shared between the heads.  

An alternative method for two-light signals is to use a relay with SPDT contacts(triggered by the track in the above diagram) and discussed in THIS THREAD and HERE.

Thanks Rob. Even in the discussions I've read it talks about relays. Is there a specific one i should find at say all electronics supply?

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