Discount Competence

So the doorbell/intercom system in my apartment kinda sucks. If the TV, air conditioner, radio, or just about anything else is on, I can’t hear it ring. Its one of those very traditional intercom systems with 3 buttons: talk, listen, and door. So, I’ve been thinking that I want to set up a little system that will allow me to hear the bell and utilize the systems functions from anywhere in my apartment. I’m thinking of wiring the audio I/O and the door buzzer function up to a relay board and connecting that to a gumtix with a bluetooth transmitter. Then writing a small application to run on my Nokia 770. The gumstix would receive the doorbell ring, transmit a signal to my n770 which would ring. I would then be presented with an interface allowing me to interact with the person in the foyer utilizing the capabilities of my n770. I’ll post an electrical schematic as soon as I’ve completed it.