This Instructable showcases a couple of example projects I made to test out if I could take advantage of this unused "Turbo Mode" and operate a gun turret remotely. I built two vehicles - one using a fully automatic battery powered Nerf gun and another using a battery powered squirt gun with an electric pump.
EDIT: I originally titled this "Hack an RC car's unused 5th channel!" but I've since been informed that it's actually just three channels. The forward/backward and left/right controls are just two channels! If you see me refer to a 5th channel, just imagine I said three, okay?
- I was helped greatly by this Instructable by techbitar: "Use Arduino with TIP120 transistor to control motors and high power devices"
- I also found some great information from this tutorial: "Using a transistor to control high current loads with an Arduino"
Step 1: Supplies List
You will need:
From Target, WalMart, Toys 'R Us, or wherever:
- RC car - try to get one big and powerful enough to carry a couple of extra pounds on its back. I used this H3 Hummer from Target. It was on sale!
- Battery operated Nerf gun, squirt gun, or anything else with a little DC motor in it you want to trigger remotely. I managed to snag this beauty (the Nerf Swarmfire) on sale as well for just $15! I also found this gun (the Super Soaker Thunder Storm) for $15 as well.
- TIP120 transistor Catalog #: 276-2068
- 1N4004 diode Catalog #: 276-1103
- 1kOhm resistor Catalog #: 271-1321
- While you're at it, you might as well get a bigger capacity battery because we KNOW the one that comes with whatever cheap RC car you're using ain't going to last. I used this one - Catalog #: 23-1272
- I found these battery connector clips useful too - Catalog #: 23-444
- Some sort of extra button or switch to put into your remote control