Instructables
This Instructable will be showing you how to make these simple magnetic 'LED Rollies' these roll around your desk or table while you wiggle a Neodymium magnet under the surface. Try using these in the dark and impress your friends and family. This project does not require any soldering or gluing as everything is held in place via the magnets.

Parts:

1 Large Neodymium Magnet (I scavenged mine from an old hard drive)
2 Small magnets (You can take these apart from magnetic toys)
3 LR930 Style batteries (I got mine from an old torch)
1 Roll of Tape (optional)
1 Table that is less than 3/4 inch thickness. (You can also use strong cardboard)
2 or more LEDs ( You can also make the effect with colour changing RGB LEDs)





 
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Step 2: LEDs

Now get the LEDs and place the negative side on the negative magnet and so on. Do this for all the LEDs or the one color changing RGB LED that you have. They should all turn on if they haven't go back and check all the parts
Dr. Pepper3 years ago
That's cool!
jwoo20233 years ago
Super Cool! You helped me with electronics!