This project takes human activity (winding a hand-cranked generator) and stores the energy in a futuristic way (ultracapacitors) to power a very efficient LED light. The human-powered generator is costly--perhaps your school can purchase one for the science lab.
Materials and Tools
Acrylic sheet, 12 x 12 inches, 1/2 inch thick (www.estreetplastics.com, Part # 1005001212)
Acrylic sheet, 12 x 12 inches, 1/4 inch thick (www.estreetplastics.com, Part # 1002050100)
4 solid acrylic rods, 1 1/2 inch diameter, 2 inches long (www.estreetplastics.com, Part # 5007524100)
6 medium screws
On/off switch (www.jameco.com, Part # 22200)
Voltmeter (www.jameco.com, Part # 2095040)
Human-powered generator (www.windstreampower.com Part # 454213)
13 screws, 1/8 inch diameter, 3/8 inch long
12 ultracapacitors (www.tecategroup.com Part # BCAP0350-E250)
Wire (#22 stranded)
Fuseholder (www.jameco.com, Part # 108792)
Acrylic tube, 1 inch outer diameter, 12 inches long (www.estreetplastics.com,
Part # 6013012100)
Halogen desk lamp (www.walmart.com, Grandrick 20-watt Halogen Desk Lamp)
2 wire connectors (www.jameco.com, Part # 302666)
LED light (http://store.earthled.com/products/earthled-directled-hl)
Step 1: Step 1
More to Think About
Is it practical to use a human-powered generator to run an air conditioner?
How could you use a human-powered generator to limit someone's TV time?
How much power can an average human produce?
How long would you be willing to wind a crank or sit on a bicycle and pedal?