I am currently working on my senior design project. My idea is to create a system that will detect when a person has mail in their mailbox and notify that person by transmitting a signal to a box in the house that will light an LED. I am planning on using a PARALAX motion sensor in the mailbox and a Cherry position sensor on the outside of the mailbox to detect the position of the flag. My question is on what type of microcontroller to use to do this. I was thinking of using a PIC but have no idea on which microcontroller to get. Any help would e appreciated.