OK, I am attempting to get my mind around the BASIC circuit diagrahm. Since I do not know all the electric circuit symbols I do have some problems. First I assume that "S1" is the SDPT toggel.
S1 is a single pole double throw toggle.
The bottom line is the common from the power sourse. Is Vs1 and Vs2 the 12 volt power sourses (only reversed to give reversed polarity to the S1)?
Yes, in my system I used a bridge rectifier type supply with the center tap of the transformer as the common. This gives dual voltages. The supply is laid out on the PC board. All parts, even the transformer, mount on the board.
Since I am small and won't have track signels (at least at the start) I believe that I don't need the DL1 and DL2?
DL1 and 2 are shown as incandescent lamps, but can also be bipolar or conventional LED's with the addition of a series resistor. They are indicators only, unnecessary for function.
C1 is a capacitor that keeps power away from the switchs unless the toggle is switched?
C1 does two things. It limits the time high current is applied to the solenoid coils to the charging time of the capacitor, and it also doubles initial voltage. This makes the action very positive without causing any damaging temperature rise in the coils.
The points move rapidly and firmly, and can be instantly reversed with this system (no waiting for recharge)!
So the main difference from my original setup is that two transformers are used one + to S1 and one - to S1. Then C1 only allows momentrary pulse to the turnout, either + or - depending on which way S1 is switched and then does not allow current all the time as is needed for the LEDs? I do not see "all the time" power to the LEDs since one line from the LEDs is beyond C1. Here's were I really need help.
This system takes either two stiff supplies or one dual polarity supply. My board has the transformer and supply on the board, so the board runs off either 120 VAC or 12/24 AC by bridging the secondary with a low voltage AC source.
The direction indicator works because it indicates "charge" direction across the capacitor. The charge direction varies of course with the supply polarity.
The charge/discharge path for C1 is dependent on the wiring to the turnout and the turnout, so if anything opens the indicators will not work.
Since LED path resistance is much higher than turnout path resistance, the toggle indicator LED's do not affect operation.