This is the 9V/RC switch track I made, powered by the old LEGO Mindstorms, and I also added the sound. Every time I switch the tracks, the sound plays (Alien-Chirp). This creation is based on an idea by "markril" from Brickshelf. For the instructions of his idea:
Please rate and comment, thanks.
About this creation
Back view (front view on top).
The full switch and the buttons (1: right, 2: left).
The motorized switch.
An "aerial view" of the Mindstorms-powered switch.
This is how it works (#1).
This is how it works (#2).
These buttons operate the switch track by the Mindstorms RCX.
I dunno what to say...
The back (#1).
The back (#2).
The Emerald Night is about this close...
The screenshot (printed on the old laptop), showing you how I program the RCX for the switch track. Originally this was the .bmp verison, but i had to replace it into the .jpg (or .jpeg) version. Thanks to MOCpages for making me have to solve that problem! >=(