Jdege writes –

The problem? A dog that gets way too excited when the doorbell rings.

The solution? Ring the doorbell at random times when no one is there, and nobody answers it, so as to counter-condition the dog – to break the association that a ringing doorbell equals excitement.

The technology? A Parallax 418 MHz RF Keychain Transmitter, Receiver, and a Basic Stamp 2.

HOW TO – Use a Parallax Basic Stamp II to ring a doorbell remotely – Link.