using a coil and magnet to power an LED

- G
- Gerhard
  
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posted
18 years ago

Mon, Feb 27, 2006 3:47 PM

Have a look at this site

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"Batteryless Bicycle Flashing Light System" "A Non-Friction Bicycle Dynamo (Generator)" Kits available from as low as 4(UK Pound).

Their marketing hype wording was drafted by a lawyer, no friction, but there must be a drag :-)

While on the topic, see two related and intersting bicycle light sites

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Gerhard v d Berg CSIR

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- HangingJester
  
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posted
18 years ago

Mon, Feb 27, 2006 7:17 PM

And a simple pressure operated switch.

- A
- Anna Banana
  
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posted
18 years ago

Sat, Mar 4, 2006 11:29 AM

Keep in mind that it is change in magnetic flux density that induces the most currents, not merely moving the coil and field relative to each other. Perhaps this means keeping your magnet outside the coil, but it could be argued so many ways.. best to experiment in this case.

Anna