I have read about using relays to gain flexibility in powering a layout. Where are some of the things that would lend themselves to relays? I am using DZ-2500 and DZ-1000 remote switches and it doesn't appear I will need any there. Can they be used to control accessories? How? I am using TMCC with common on both outside rails, 3 rail O gage Gargrave Phantom SS track, and center has 17 volt power. Separate transformer for accessories, 17 volt 135 watts.
I guess I don't understand where to use a relay.
Paul
One application is for block signals. Radio Shack has a good DPDT relay. Not sure of the part number. You can use the normally closed contact for the green, clear aspect and the normally open contact for the red or stop aspect. You would use the insulated outside rail to energize the coil. Note that you will need a full wave rectifier between the coil and the AC source because the coil is DC. When the train passes over the insulated rail it changes the signal from green to red.
A relay is a device used to solve a problem. I never considered trying to find a problem so I could implement a pre ordained solution. It is not unlike saying "I would like to apply a tire patch. Where can I find a leaky tire?
Dave
Lackawanna Route of the Phoebe Snow
The most common application for a relay is block signals. They can be activated with control tracks instead of the sketchy contactor Lionel provides. I believe our host has a couple of good wiring books that show all sorts of circuits relays can be used for.
I agree that replacing 153C contactors is the most popular use for relays. However the "Kalmbach" circuit, which I have described many times on the forum, is simpler: http://cs.trains.com/ctt/f/95/p/204253/2234035.aspx#2234035
Bob Nelson
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