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How to Make Your Own RC Bump Box

RC, or radio-controlled cars, offer the fun and excitement of electric car racing. They rely on rechargeable battery packs for the necessary power. However, since batteries can undergo only a limited number of charge cycles, charging your RC car's battery during a race is crucial for reaching your RC car's peak performance. One of the best ways to keep your RC car's battery fully charged during a race is to use a "bump box," an electric supercharger. You can upgrade your RC by purchasing a bump box from the market; however, building one on your own will save you money while allowing you to quickly recharge your RC car's battery to maximum capacity as you drive your RC car on the track.

Things You'll Need

Cordless drill and 1/18-inch drill bit
30-inch-by-30-inch metal box
Two 18-volt motors
Double-sided sticky tape
Two rubber wheels
Bolts
Two 18-volt batteries
Two-into-one connector
Pliers

Instructions

- 1
  Drill two 1/8-inch holes straight through the center of two opposite sides of the metal box.
- 2
  Create a mounting surface with a strip of double-sided sticky tape across the bottom of the box. Put the motors inside the box and slide their shafts through the drilled holes. Press down the motors firmly against the flooring.
- 3
  Attach the bolts of the rubber wheels to the protruding motor shafts.
- 4
  Install two 18-volt batteries in the battery holder of your RC car. Connect the ends of battery cables together, positive to positive and then negative to negative, using a two-into-one connector.
- 5
  Connect the batteries̵7; positive and negative ends to their respective terminals on the motors. Twist together the bare ends of wires of the same polarity with pliers. Test all the motor connections and check their speed, or RPMs. Both motors should be spun at the same RPM.

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