This design challenge presented itself at an opportune time. The model railroaders are putting the finishing touches on a bridge that requires some automation.
On the other side of the bridge is a turn-about that the tug (A) needs to reach in order to change direction. I have been asked to create the following automation sequence.
Tug triggers sensor (A) to indicate the bridge needs to raise.
Gate (B) lowers indicate no traffic to enter bridge
Bus (C) stops.
Ramp (D) re-aligns to make room for bridge movement
Bridge (E) raises.
I suspect a button (no letter on the image) on the turn-about side will be required to indicate when the tug has completed it transition and the bridge can be restored.
My initial assessment is two inputs and four outputs.
Inputs
Tug Trigger
Operations Trigger
Outputs
Motor control bridge gate
Power interruption bus
Motor control bridge ramp
Motor control bridge
I am hoping to use a Arduino Uno for the project. If you have an extra to spare you can throw it my way.
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