The guys over at Robotics Connection helped me out and custom designed some sweet relay boards for me. Hopefully they'll start selling them pretty soon.

Each board is optically isolated (no feed back), can be either a master or slave (5 of mine are build as slaves), have 8 relays, and as master, can be connected via USB, Bluetooth, XBee, or Serial.

With version 2, I'm actually going to shift dramatically how the bartender works. The overall theme for this release is cost reduction and better parts.

The relay boards are the first step. Now lets rewind slightly and ask, what do the relay boards do? They turn on and off electronic devices, much like a switch. I'm using them to turn on and off my valves.

All 6 of my brand spanking new relay boards

Close up of the master relay board

You can see that you can detach the communication device. Bluetooth could be added on if needed.