When people want to know why I tore apart my brand new laptop the day I received it to install a different hard drive, I point to my Grandpa. His alarm clock doesn't wake him, so he wired it via a relay to a transformer which drives a very loud bell. He tends to lose his car in parking lots, so he rigged this light to the interior trunk light. When he can't find his car, he hits the trunk release on his keychain and the trunk raises up with a giant red light on it.    Stuart, FL -- 7/26/2013