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DIY Machine

DIY magnetic toys

Source: Author: Time:2008-06-23
As sold at the store, like floating globes, which allows objects with a magnet floating in the air, but this device combines permanent magnet and electromagnet, using a micro-controller and an IR sensor, when the house is equipped with magnet small object placed on the bottom of the electromagnet, IR sensors will be sensitive to the presence of objects, micro-controller starts and adjust the magnetic size of the electromagnet, when the small objects by the upward and downward magnetic force of gravity the same, it will float in the air, floating position and is highly dependent on the size of the weight and magnetic force.


   

Principle diagram:



1.Material
- ATMega168 Microcontroller
- 1 16-20 MHz Crystal
- 28 Pin Socket
- Dual Full H Bridge IC
- 1 Power NPN
- 2 Electromagnets
- 1 Bicolour LED
- 2 IR LED
- 1 IR Photodiode
- 1 5V Regulator
- 2 Leveling Capacitors
- 1 SPST Switch
- 1 NO Button
- 1, 470 Ohm Resistor
- 1, 5 Ohm Resistor
- 1 Universal Breadboard
- 2 Cases
- Plexiglas
- Solder
- Hot Glue
- Steel Wire
- Vinyl Tubing
- 3 or more 1/4" diameter x 1/4" thick rare earth magnets (for the base)
- 2 or more 1/2" diameter x 1/8" thick rare earth magnets (for the objects)

Tools:
- Soldering Iron
- Hot Glue Gun
- Desoldering Pump
- 3rd Hand
- Plexiglas cutter


 

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