Rick,
Here is the heart of a "Which way did I move that paddle last?" circuit using discrete components. (Set-Reset Flip-Flop)
http://www.circuitdb.com/show.php?cid=130I would start out by multiplying the resistor values by 10, as you don't need super bright LEDs on your panel.
(4.7K Ohm and 75K Ohm)
You would need a steady DC supply to power the circuit. (AC accessories output --> Diode bridge --> electrolytic capacitor.)
Momentary center off DPDT switch: (which takes the place of the two momentary SPST switches in the above diagram)
1 2 3
4 5 6
4 -->left transistor base
5 -->circuit ground
6 -->right transistor base
Note that this doesn't tell you if your turnout points actually moved all the way into the desired position, it just tells you which direction you moved the paddle on your panel last.
1 -->turnout motor left terminal
2 -->AC accessories terminal 2
3 -->turnout motor right terminal
AC accessories terminal 1 --> turnout motor center terminal.
Now, after all that,
A DC capacitor (capacitive?) discharge system is much simpler and more logical to use. (Circuitry is much simpler and the paddle remains in the direction you set it.)
Seems to me Nigel had a nice circuit for that.
Nigel?
Hope this helps.
Sincerely,
Joe Satnik