Parts
-
toothbrush
- 3V battery
- pager motor or other tiny motor with an unbalanced output shaft
- Small switch
- Double sided tape
Image from: Evil Mad Scientist
Assembly
- Cut off the handle of the toothbrush
- Solder wire leads to the motor terminals.
- Add a switch (solder to middle lead and toggle lead) .
- Select a battery holder.
- Apply a small piece of double sided tape to the top of the toothbrush robotic platform, which will be used to hold the motor/circuit in place.
- Battery and motor placement, bristle shape (one stray long bristle can interfere with the motion, and motor rotation direction all influence the behavior). Try flipping the battery upside down if you have trouble getting your bot to go straight.