Build a Very Small Robot: Make The World's Smallest Wheeled Robot With A Gripper.

Step 7 Adding Sensors

This robot has no sensors. To be truly useful as a robot manipulator of small objects it would be an advantage to have a feedback loop to the microcontroller from various real world sensors. To avoid putting a power supply on board, light sensors could be used. Laser or infrared light could be directed to the top of the robot and mechanical reflectors or blockers could be connected to touch sensors, pressure sensors, or temperature sensors and variable reflectance read by photocells or a video camera.

Another possibility is to use RFID technology to transmit a pulse that powers electronics on the robot to return instead of an identifying number, a sequence of bits that represent variations in touch or other sensors.

Comments

[LEDgonuts]

but you guys are wrong  cause the magnofield/magnet hooked up the servo would be nothing with out the external165378 resister and the magnetic feild to cobine with the remote to create signals thru the  feild to the magnet wich i have no i dea how powerd to resieve the disierd movement its not stop motion its not rocket sience     


                                                            LEDgonuts

[natman3400]

There is a tiny magnet in the robot. He moves big magnet under table, robot follows big magnet. Simple example: -Take two magnets -take a piece of paper -put one magnet on top and one on the bottom of the paper -move around the one on the bottom -see the one on the top move with it This robot moves in the same way

[mikevanky]

There is no motor to turn the wheels that are actually beads. I believe he used stop motion to animate this robot. I may have missed some thing here.

[phaedrus42]

Yes, you missed something. Take a closer look at the instructable and you will see that it is using an external magnetic field to control movement. See pic 5 and 6. I agree that it does look like stop-motion animation, probably because of the slightly jerky motion caused by the magnetic interaction.