This is one outstanding idea, thanks! Sadly, I'm about inept as they come in the realm of mechanical/electrical engineering. This is exactly the kind of thinking I'm looking for, though.
Keep the ideas coming!
Thanks,
MW.
We have a night cache in our area that uses LED's controlled by remote control. The first waypoint has the remote (you can also bring a householde remote from home, they work too), and then when you get to the next waypoint, you turn around clicking the remote until you see the blinking LED. Below the LED is a tag with the next coords. Then the final has a light shinning on where the cache is hidden. SO far this is my favorite cache yet.
Control The Night