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This bike generator has successfully powered many things at many events. In this case a Sony Play Station 2 PS2. Below is some electrical chart data recorded using LabVIEW software that I wrote. This experimental test data shows Volts, Watts, Amps, Rear tire RPMs, and Heart Rate. This demonstration was done while playing a Harry Potter Video Game. The time period was about 3 minutes. I'm going to post a longer time interval soon.
Note that the big green spike at the beginning of the chart. This is from when the Alternator starts putting out 14.8Volts DC and charges a 4 Farad capacitor. When the PS2 Sony Play Station is Turned on, there is a jump in power from 10 Watts to 30 Watts (look at the green line).
The bike had to be in its highest gear to get the 300 RPM needed to start up the generator. Using the formula for circumference = π x Diameter = 3.14 x 26 Inches = 81.64 inches = 6.83 feet circumference. Converting RPM to Miles Per Hour We get:
Note that you will not have much luck with a beach cruiser - single gear type bike unless you are sure you can get the rear tire up to 300 RPMs.
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