<div>This article describes the simulation results of an
<br>astable multivibrator aimed to be fed by a photovoltaic
<br>cell, with the purpose of energy harvesting for electronic
<br>systems. The circuit was simulated using metal-oxide
<br>semiconductor field effect transistors (MOSFETs) and
<br>bipolar junction transistors. The use of half-wave and
<br>full-wave rectifiers for DC output voltage supply was
<br>also analyzed. The circuit reached a peak efficiency of
<br>28 % when using MOSFETs PMDXB550UNE and half wave rectifier.
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