The control panels I designed use capacitive discharge circuits for each turnout.  The basis for the circuit design was taken from the book “Model Railroad Electronics” by Peter J. Thorne.  This is a Kalmbach book that I believe is out of print.  The design works really well and is very reliable.  Essentially it uses capacitors to store energy to throw the turnouts and SCRs to control the discharge though the turnout coils.  The best part about this design is that it allows the operator to see the direction the turnouts are thrown on the control panel with LED indicators.  This makes it very easy to see that all the turnouts your locomotive is approaching are thrown in the correct direction.  As you can see, I use two LEDs for each turnout.  One of the LEDS is illuminated, indicating the direction the turnout is thrown, as seen below.  By depressing the pushbutton switch, the turnout is thrown to the opposite direction and the other LED illuminates.

This is the largest of the control panels for the Eugene yard.

Here is a smaller version of the control panel for the Superior paper yard.