Dual-axis photovoltaic tracker

1. Hardware module

Main control chip: STM32F1038T6

Power chip: CN3791 (MPPT photovoltaic charging chip)

                  WD01V (lithium battery protection chip)

                  FP6276 (3.7V to 5V chip)

                  AMS1117 (5V stable 3.3V chip)

Servo: MG995

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2. Principle introduction

Function: Track sunlight in real time, adjust the inclination angle through the steering gear, and always keep sunlight directly on the photovoltaic panels to maximize charging efficiency. A 19650 is used for power supply, and photovoltaic panels are used to charge it at the same time.

Principle: The ADC detects the divided voltages of the photoresistors in four directions, and controls the steering gear and the inclination of the photovoltaic panel through PWM, so that the divided voltages of the four photoresistors are consistent and the optimal angle is achieved.

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3. Physical pictures

(This model only introduces the principle of the dual-axis tracker and cannot achieve self-sufficiency, that is, the model consumes more power than photovoltaic power generation...)