Power Generator
Imaging Lens
Image Sensor
Polyoptic Wheel
Viewfinder, Eye
LED Flash
LCD Display
Image Processing

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Introduction      Gears      Gearbox      Electromagnetism
Dynamo      Battery      Circuit      Illustrations

Power Circuit

Figure 8 shows a simplified diagram of the power generator circuit used by Bigshot. Besides the components described in the previous sections, the power circuit has a special semiconductor chip, called a diode [1], which is placed between the dynamo and the rechargeable battery. It acts as a one-way switch allowing charges to flow from the dynamo to the battery but not the other way. Without the diode, there would be no way to stop the charges in the battery from heading back into the dynamo. If that happened, the dynamo would act as a motor and will automatically spin the hand crank [2]!

Diode Dynamo Battery Bigshot
Figure 8: Simplified version of Bigshot's power circuit

Click the two buttons in Figure 8 to see how cranking the dynamo causes electric power to be stored in the rechargeable battery, while pressing the shoot button causes the battery's power to get used.



[1] "Diode." Wikipedia, The Free Encyclopedia. Sep 26, 2009. [Online]. Available: http://en.wikipedia.org/wiki/Diode. [Accessed: Oct 3, 2009].
[2] "Electric motor." Wikipedia, The Free Encyclopedia. Sep 26, 2009. [Online]. Available: http://en.wikipedia.org/wiki/Electric_motor. [Accessed: Oct 3, 2009].