RC Lego Missile Launcher

Chasing the kids around with Nerf guns is tiring. If only there were some way to shoot at them without needing to get up...

Now, there is. Presenting the remote-controlled Lego Missile Launcher:

It both steers and fires remotely, using two IR remote-control sets (one for left and right wheels, one for the launcher). There's another motor channel still left, which could be used to control the elevation of the launchers, or for a second launcher.

Here's a front view of the launcher, showing one of the IR receivers and the gearing for the wheel motors:

Here's a picture of just the launcher assembly. When the motor turns the worm gear, it slowly rotates the camshaft. Each of the cams triggers one of the missile launchers.

Since the cams can be positioned in four different ways on the axle, it's possible to add two more launchers outside the adjustable angle supports, firing out of phase with the two interior launchers.

Next, I'm tempted to rebuild it using Lego Mindstorms, and program it to seek and destroy targets on its own...