Group schematic

1. Function introduction

  Use a light source sensor to receive the light source, and then use a series of analyzes to detect its light intensity, power frequency, power frequency percentage, high frequency frequency, and high frequency percentage. It is displayed on the LCD screen and provides humanized brightness prompts and friendly prompts.

2. Principle introduction

What our team produces is a circuit board that extracts frequency signals so that the signals can be transmitted to the microcontroller for processing and displayed on the LCD screen.

The circuit schematic diagram is designed using Lichuang EDA. The overall diagram is as follows:

Using linear regulators and chips such as LMV358, a series of signal frequencies are filtered and transmitted step by step, analyzed and transmitted.

A linear voltage regulator lamp is used to convert and transmit the voltage signal.

Transmit the converted signal to the LMV358 chip for 16Hz low-pass filtering to extract the DC signal

Receive the low-pass filtered signal and extract the power frequency signal.

Amplitude detection of low frequency power frequency signals

Then, in the same way, the high-frequency signal is extracted, and after a series of processing, the amplitude of the high-frequency power frequency signal is detected, thereby obtaining the frequency amplitude of the light source, etc.

Award information: Third prize in school competition

Team members: Wang Zhichao, Jiang Yufeng, Zhang Yue

Instructor: Qi Qiuju Huo Xuyang