Here is the .pdf version of my in class presentation. Energy Presentation
DC motor: Voltage 24 volts. Power 250 watts. Rated speed 2750 rpm. Rated current 13.5a
We then measured the voltage we could produce without any load. Bicycling lazily, Jay could produce 15 volts.
[Powering the Raspberry Pi]
We bought a 12 volts rechargeable battery that will eventually be recharged by the bike-powered DC motor. Here are the battery specifications:
Battery: enercell sealed lead-acid. 12 VC. 7.ah. Normal charge 14.4-15 OV. Stand by 13.5-13.8 V.
We built a circuit that could regulate the voltage down to 5 V using the following:
Battery -> 100uF -> 7805 regulator -> 100uF -> 1uF -> Raspberry Pi
Raspberry Pi draws .500a to .700a to boot.
It took Cycling for 1:52 to fully charge three 2.5VDC Capacitors in Parallel.