Vibrobot Socbot - remote controlled micro robot
This is one very small and compact wireless robot. The only moving parts are rotors of vibration motors from an old pager or a mobile phone. Now, we all know how our mobile phone dances around on a table while vibrating. Imagine another vibra-motor inside a phone that rotates in the opposite direction. Now imagine first vibra-motor is activated, then the second one. That would make your phone first move left than right, and if both motors are running simultaneously you would get forward motion.
This robot has IR receiver and can be controlled with RC5 remote control. Microcontroller used in this application is PIC microcontroller, actually PICAXE chip.