|5V Power Relay|
|Liquid Flow Meter|
|2.8" TFT Capacitive Touch Screen|
So after a few modifications to the original plan, I am now going to use the flow sensor to power a relay that will turn on my beer light. It will also count how many beers are left in the keg and display that on the touch screen. The temperature sensor will also display the temperature inside the kegerator on the screen.
Now that I have a touch screen, I can interact with the Arduino to reset the beer left counter once the keg is replaced. I may also get another relay to control the temperature inside the kegerator. Currently, there is a knob inside that's just numbered but you have to guess at the temperature. Using the Arduino to control when the compressor turns on and off may help keep the beer at a more stable temperature.
All the parts are currently en route to my house. Once they arrive I will post more pictures of how the build is going. You can also find the source code, flow diagrams, and amplifying information over at my repository.