Modular temperature sensor based on LM393

1. Module description
           1. The ambient temperature can be detected through the thermistor
             2. The sensitivity can be changed by adjusting the potentiometer
             3. Analog and digital quantities can be output for easy collection
             4. Using the voltage comparator output inside the LM393, the resulting waveform Relatively clean
             5. Small board, less component requirements.
 
2.
                See Appendix
 
 
 
3 for the physical display demonstration video. Interface description
             VCC: Connect to 3.3V-5V voltage
             GND: Ground
             DO: Digital output port
             AO: Analog output port
 
4. Instructions for use (1) 1 The thermistor module is sensitive to the ambient temperature The most sensitive, generally used to detect the temperature of the surrounding environment. 2. When the ambient temperature of the module does not reach the set threshold, the DO port outputs a high level. When the external ambient temperature exceeds the set threshold, the module DO outputs a low level; 3. The small digital output D0 can be directly connected to the microcontroller. Use the microcontroller to detect the high and low levels, thereby detecting the temperature changes of the environment;
 
5. Instructions for use (2)
        Connect VCC and GND, the module power indicator will light up. Place the module on the desktop, adjust the blue potentiometer on the board until The switch indicator light on the board lights up, then adjust it slightly to make the switch indicator light go out, and then find a way to increase the temperature of the thermistor. At this time, the module switch indicator light will light up. If the temperature of the thermistor is lowered further, the switch indicator light will return to the off state. This phenomenon shows that the ambient temperature can trigger the module, causing the switch indicator light to light up.