PV module’s current and voltage changes resulting in shadowing of the leaf was measured using current and voltage sensors, and these signals were provided for the microcontroller inputs through signal conditioning circuits. The measurement of a sample leaf, which was placed in between the PV module and a diffusing glass, using the developed area meter is shown in Figure 8. The shape of the leaf which resembles to one of the tested areas is selected by the switches. According to the obtained equations, the microcontroller programcalculated the leaf area and this leaf area was displayed on an OLED as shown in Figure 9. The leaves tested by the area meter are shown in Figure 10.