One of the beta testers is having issues with their 3D printer. Rather than get bogged down, we came up with the ultimate minimalist design. We used the battery as the body of the robot!

a no-frills LoCoRo
a no-frills LoCoRo

Start by covering the battery with tape. This will help the hot glue to stick and allows everything to be pealed off later. Now positioned the Raspberry Pi and PWM board near the end of the battery with the USB ports. Mark the holes with a pen or pencil then set the boards aside for a moment.

Work on one board at a time.

Placed a liberal drop of hot glue at each mark for the Raspberry Pi, waited about 5 seconds and then positioned the Pi on the drops. Then add a drop of hot glue to the top of each hole. The bottom drop acted like a standoff and the top drop bonds to the bottom, locking everything in place.

Now repeat for the PWM board.

hot glue mounted electronics
hot glue mounted electronics

Use double sided foam tape on the servos. Press these to the underside of the battery as far back as they will fit.

For wheels, you can use plastic jar tops – such as those on peanut butter jars. Cut a small hole in the center of each. Scuff the area around the holes and then hot glue a servo horn to each. Add a few office rubber bands to improve traction.

plastic jar lid wheels
plastic jar lid wheels

All the LoCoRo really needs is a “skid” in front. Anything that can slide will do – such as the top off a soda bottle. Tape is added around the cut and hot glued onto the bottom front of the battery.

soda bottle skid
soda bottle skid

Wire it up and go!