OK, this is what I came up with:
Basically, the bridge extends for 8 seconds and then automatically retracts. I decided to use your suggestion, Ako_the_builder, for an elevator in my base (minus the auto retraction) and TangentialThreat's suggestion for the bridge. I hooked up to that a Toggle Latch wired to an 8 second Timer with repeaters to stop the flow for an automatic bridge using the Camo Gate.
Basically, the bridge extends for 8 seconds and then automatically retracts. I decided to use your suggestion, Ako_the_builder, for an elevator in my base (minus the auto retraction) and TangentialThreat's suggestion for the bridge. I hooked up to that a Toggle Latch wired to an 8 second Timer with repeaters to stop the flow for an automatic bridge using the Camo Gate.