5/12/15
A heat sink for the 7805 regulator along with thermally conductive grease was obtained on 5/10.
Final report draft was finished on 5/11.
In-class lab
The circuit output was tested by using an oscilloscope and the result showed that the AC generated by the alternator was converted to DC successfully. Also the output voltage plateaued at about 5 V as expected, even when the rotation speed was increased.
Idea for electrical system: get a plastic box attached to the bike frame to hold the electronics, cell phone and connector cable.
Idea for getting data on voltage and RPM(Rotation Per Minute): Counting the RPM manually or utilizing the frequency of the alternator power to calculate the RPM since the frequency is directly proportional to the speed.
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| Figure 1: Secured Mechanical System |
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| Figure 2: Left Side View |
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| Figure 3: Right Side View |
Mechanical system, as the figures show above, was adjusted and secured to prevent the rubber wheel from being off the track.
A 15 minutes test drive showed that everything stayed attached and aligned. It also showed that the additional charger barely affected the normal riding.
