Hello and congrats for your great work.

I was looking at your eagle files and i was wondering...
Is there a reason you chose not to use arduino's RAW input which already has a built in voltage regulator and went with 7805 voltage regulator + capacitors?

The reason i'm asking this is is because i always use a 4-1 senor (temp, hum, motion and LED dimmer) which requires 12v input so 12v dcc is a must have with this kind of setup.