Abstract
The purpose of this work is present a low cost irradiance (W/m2) meter using a solar cell. By the constant monitoring of the open circuit voltage and the short circuit current of the solar cell it is possible to calculate the effective irradiance. This work pretends to avoid the use of classical solar irradiance sensors (e.g. pyronometer), which are expensive. The instrument consists of a solar cell, a simple sensing circuit and a microcontroller.
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