References

1. http://www.allaboutcircuits.com/vol_3/chpt_3/4.html

2. http://www.electroniccrafts.org/?n=Main.Shakelight

3. http://www.electronics-lab.com/projects/power/018/index.html

4. http://www.ehow.com/list_6729508_components-shake-flashlights.html

5. http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html