MOST ROBOTS USE electric power. The two main sources of untethered electric power for mobile robotics are batteries and photovoltaic cells. In a few years fuel cells will become a third electric power source for robotics. Photovoltaic Cells Photovoltaic cells, commonly called solar cells, produce electric power from sunlight. A typical solar cell produces only a small amount of power, a few milliamperes at a potential difference of about 0.7 volts (V). Solar panels (modules)...
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