Experimental Environment
Recently, the microcontroller enthusiast used ESP32 and Phyphox to plot the I-V characteristics of a solar panel. The experimental circuit is simple to set up, with automatic data collection and automatic graphing, saving time and effort while yielding good results.
What used to take dozens of minutes to complete can now be done just by turning the potentiometer knob.
In this experiment, the programmable resistor board is adjusted to 1000 ohms to serve as the internal resistance of the ammeter, with the solar panel acting as the power source, connected in series with the programmable resistor board and the potentiometer to complete the experimental circuit.
I-V Characteristics Curve of the Solar Panel
Next, upload the program and connect via Bluetooth. Under constant lighting conditions, by turning the potentiometer knob, the I-V characteristics curve of the solar panel is automatically plotted on the phone screen.
Full Screen Display
If a variable light source can be found, the effects of light intensity and angle of illumination on the I-V characteristics curve of the solar panel can be studied.
All it takes is to move the light source, change the angle, and turn the knob.
Circuit Setup
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