Track Delay Timer - How does this work?

Chris,

It looks like 4/5 and 6 are the normally open and normally closed pins on the relay.  the wiper pin is the black wire running to number 1 on the terminal strip which looks like it is positive AC. (track power)

The blue thing looks to be a PC board mount relay mounted upside down.

You can measure it with a multimeter, but when the timer is engaged you should see voltage on either pins 4/5 or pin 6 depending on the way the relay is thrown.

The other two pins that have red wires attached coming from the transistor look to be the coil perhaps.

If you have an Amazon account, you can look inside, search Automatic Train Stop. Easy Electronic Projects

#3 is separate power for timer, 5 and six for red and green lights.

Nice book, has some cool stuff.

Thanks everyone I will give this a try

Hi Chris

I have the write up on this. 

Assume you have a stop block with an insulated outside rail and an insulated powerrail.

1 goes to the power rail in the running block. 

2 goes to the insulated outside rail.

3 is not used

4 goes to the insulated power rail.

5 goes to a green signal (if used)

6 goes to a red signal (if used)

If you have a SPST switch included so that the stop block circuit can be bypassed, then a second wire is run between 2 and the non insulated outside rail.