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Lego Electricity Generator Answered

Now i was cleaning up my room and found this lego generator. So i opened up the lego block and got the generator.
I don't know any of the specs for it, and don't have a multimeter or something handy to test the out put.
I assume the black thing is the capacitor, it has this written on it:
Some is hidden against the casing of the generator.
What's the point of the magnet i move around in the video?
Well aswell as helping me with that is there anything i could use this for?

(Which is side is + and - ?)

4 Replies

Punkguyta (author)2007-02-09

It's actually from a motor brick found in most lego mindstorms kits. I've seen where you can hook one up to another motor and when one is spun, the other spins aswell, this is a good example of how current moves. And yes that is a diode in place basically like a fuse.

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photozz (author)2007-02-07

Actually, this looks to be a standard DC motor. The black thing would be a diode. Diodes allow electricity to flow only in one direction. Placing one across the terminals like this is typically done to prevent a surge of current from flowing back to whatever circuit is controlling the motor. Now, you can use a DC motor as a generator. when you apply electricity to it, it spins, if you spin it, it produces electricity. As far as how much you can generate with a small motor like this, I would say not much. It all depends on the way the motor is would and how fast you spin it. there is a formula for it, but I don't know it off the top of my head.

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minus273degrees (author)2007-02-07

hey not sure what you meant about the magnet and in the video it isnt clear but as soon as you said magnet and generator i straight away fort that its a magnet to turn a generator to create power im not sure message me back to tell me

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bigpinecone (author)2007-01-28

there is no + or - it all depends on which way u spin the motor and the voltage changes, it is higher when spun faster and less when spun slowly

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