operated either by DCC addressing which is great for users
with JMRI Panel Pro or a hard-wired control panel. I didn't
want the extra expense and complication of adding a com-
puter screen for each operator so I chose hard-wired control
panels. The Dual 3-Way documentation includes a schematic
for a control panel interface that needs only four wires per
semaphore blade between the controller and a control
panel. That suited me fine.
17a: The three-button control panel schematic from Tam
Valley. Duplicate this circuit to control both semaphores.
17b: Panel updated for use with rotary switch and a
single push button switch. I tried this wiring at Oakhill.
