Help building an airlock

Was wondering if anyone can help. Im trying to build an underwater city with working airlocks to get in. I can wire it so that the door on the right only opens when the door on the left is closed, and so the drains only work when there is liquid in the room. The problem I'm having is that I want a switch on the outside (left hand side) to open the first door, but this interferes with the mechanism for making sure only one door is ever open at one time. ie, if I switch the outside lever on, and then go inside, the wheel in the middle (which opens the right hand door and closes the left) won't work because the lever on the left is still open. Technically I can still operate the lever from inside the room with the door closed, but i'd rather have it work properly. Ive included a picture of the airlock room.

 

Love your base!
There's already a few threads on this:
http://community.playstarbound.com/index.php?threads/how-do-you-make-an-underwater-ocean-base.90549/
http://community.playstarbound.com/...to-know-how-to-make-an-underwater-base.91738/

but the brief is that there are liquid sensors and drains, then logic the whole apparatus. also timers could work
and there is evidence of a open pool pressure lock, a well effect?

 

I'd suggest looking the existing threads, but this is a logic challenge that I'll try myself and show you the results

Well.... This works:


A lot of the logic there just turns the levers into buttons to make it work better, and I didn't worry about closing the outer hatch when you leave.

 

This sounds like a job for AND and Latch logic gates.

If I could go there and see the wiring in person, I could probably figure it out in a hurry.

 

I am a very lazy person, so I would just use a button instead of a lever for the outside switch, such that it closes behind me automatically.

I'm not at home right now, but I'll mock up a nice "proper" solution when I am.

 

Love the layout!

The switch is a Not switch

 

I made a lazy solution to your problem. Not quite as lazy as buttons - it uses the levers just like you asked - but it doesn't enforce any rules about doors being open at the same time, so it's not a true airlock. I'll make a proper one soon.

 

Thanks for the suggestions. Ive kind of got it to work how I want, although I feel its a bit more complicated than necessary. The way it works right now the lever on the left opens the first door, and closes the second one if its open. The wheel in the middle closes the first door and opens the second, and the third lever closes the second door behind you and opens the third door into the main base. The drains are set to switch on when either door is open, and I've stuck an alarm on each side which switches on when the corresponding door is open. It works in reverse too. My aim was to get it so an NPC could get into the base (not sure if they even can at the moment) without being able to flood it. Hopefully, because you can't progress into the base without closing both airlock doors and draining the room, it will be impossible for a single npc to screw it up although I imagine if their were multiple ones pressing buttons at different times it would still go wrong. Id also like to be able to set it so that the drains close a few seconds after the doors so they could drain the residual water once you leave the base, but I don't seem to be able to get the timers to work like that. [DOUBLEPOST=1424368572][/DOUBLEPOST]

The fish will trigger the motion sensor!

 

You need an AND and a NOT gate.
In the picture, the 2nd NOT gate is to ensure 2 switches can open the outside door. Personally I just use proximity sensors for that
http://puu.sh/fFGDL/4165e95e87.png
http://puu.sh/fFGFT/7e74984a2a.png

Not my design, but it is what I use

Way simpler than what you have there

 

Nice looking base!

I am pretty stoked to try some of these ideas out. Never thought to build an underwater base.!

Cannot wait for the planet teleporters they hinted at!

 

I like that, but you use four switches to open two doors whereas my version uses three to open three. I also wanted to use the hylotl switches as its a hylotl themed city I'm building, but using levers rather than buttons creates a whole load of other problems. I was going for a Rapture kind of look so I'd prefer it if it used more basic switches, and I HAD to have a wheel to drain the room and open the second door (because what kind of airlock opens without turning a big wheel?).