Auto Bypass Airlock

​Auto bypass airlock This will operate as an airlock until the rooms on either side of the airlock are the same and then the light will go green and it will operate as a bypass bulkhead allowing you ​to pass through without waiting for the airlock cycle but still remain closed for emergencies. It will revert to an airlock if it detects differences in the two rooms. Can abort the airlock cycling by opening the door you entered during the vacuum cycle. Can skip the repressurisation by opening the exit door during the pressurisation cycle. LED: Green = both rooms are the same. Bulkhead mode. Yellow = Differences detected. Airlock mode. Red = Airlock in operation. Setup: d0: inner door d1: outer door d2: inner vent d3: outer vent d4: gas sensor inside the airlock d5: LED and: gas sensors outside each of the airlock doors