I'm in the middle of a basement retrofit and have a refrigerator that I'm hoping to convert to a kegerator. Before I go to town drilling and such, I was wondering if there was a way I could use a Raspberry Pi to control the flow of CO2 to the tap?
One way that I can think of would be to connect it to a servo that would mechanically displace the faucet (squeeze or perhaps a lever). The other would be to figure out how to control the flow of gas through the tubing with a Pi by somehow displacing the ball lock on the inside of the connector.
I may be missing something obvious here so I'm open to suggestion. Ultimately, what I'd like to shoot for would be a push-button beer dispenser (perhaps PIN-protected for the kids).