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Reply to "The RR Track Signal Control Board Project"

Hoping maybe Stan2004 or GRJ could help with this question....  Quite a while back Dale H posted a signal control scheme for 3 light signals using 3PDT relays....   I found the original sketch of the wiring diagram  it's shown below.....  I would like to adapt this to some LED signals that I have purchased that are 3 volt common anode with dropping resistors installed (NJI)...  so I can power them with 9 to 12 VDC...

So I have 2 questions.... Where Dale H drew in "Block Signal Transformer" power (AC symbol),  (Lower Right Hand corner)...    I am using insulated rail which is sending AC common to close the relay solenoid ?    I am using a separate PW Lionel DC transformer which has the negative DC  terminal tied to my AC Common on the layout which is how I am driving all my other 12 VDC DPDT relays...   That's working for DPDT so it should work on my 3PDT  12 VDC relays ?

Next question the power going to relay 3 in Dale's sketch  should be the 10 VDC as I am using LED signals not incandescent lamps ?  Also,  I assume that if I hook of 6 of these in sequence,  I should follow his diagram, then all lower right relay common or collector terminals, (not sure which term is right) get the 10 VDC + to the 3rd set of relay contacts on the RH side for every relay ? 

Other than that, I just keep copying the interconnection scheme he drew up between Relay Block 2 and Relay Block 3

Last edited by chris a

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