Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Solenoid Electricity Generator

  1. Apr 9, 2015 #1
    Hi all,

    I'm trying to generate enough current using a solenoid to intermittently power an LED. My plan is to buy some enameled copper wire and wind it around pipe. This will be my solenoid. Then, magnets will be pulled through the pipe on string or what-not and, by Faraday's Law of Induction, an EMF will be generated.

    I understand that this EMF will be sporadic. It will depend on the number of windings and the strength of the magnets that are pulled through. Do you think it could be enough to intermittently light an LED?
  2. jcsd
  3. Apr 9, 2015 #2


    User Avatar

    Staff: Mentor

    There is a much more efficient way to use the windings and the magnet(s). When you look at the arrangement of the rotor and stator in a generator (or motor), do you see how you can make your generator more efficient?
  4. Apr 9, 2015 #3
    Unfortunately I have serious design constraints for the application I'm looking at. The most important constraint is that I need to be able to drag or pull the magnet through the solenoid.
  5. Apr 10, 2015 #4
    You can buy this...look up "Shake Charge Flashlight" -
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Solenoid Electricity Generator Date
Moving a solenoid coil in a strong magnetic field Feb 6, 2018
Electric field inside solenoid Aug 24, 2014