0x00 Introduction

Two-channel photoresistor sensor module based on GL5616 photoresistor. Ultra-small size, two photosensitive inputs, digital-analog dual outputs. Using LM393 voltage comparator. A low-cost, small-volume photosensitive module. **The board has been printed and verified that the function is normal**.

0x01 TIPS

1. The PCB is a four-layer board. 2. When the analog (AO) output is input at 3V3, the light output is 0V. As the light intensity gradually weakens, the output reaches about 1V. The voltage range of the analog output will change according to the size of the voltage dividing resistor used (as shown below) ), please pay attention to the acceptable ADC voltage range of the circuit you are using and use a resistor with appropriate resistance according to the required output to avoid problems or damage to the measured and controlled data.

3. The digital output (DO) is TTL level. It outputs low level when receiving light and outputs high level when there is insufficient light. The reception threshold can be adjusted according to the ambient lighting by turning the 3362 rheostat.

# 0x02 Actual picture