LM35D Analog Temperature Sensor Module

Where digital sensors like the DS18B20 hand a microcontroller a ready-made number, the LM35 instead outputs a plain analog voltage that rises by exactly 10 millivolts for every degree Celsius, which means converting a raw ADC reading into an actual temperature is a single-line multiplication rather than needing any lookup table or digital protocol library. That simplicity has made it a long-standing teaching tool for understanding analog sensing fundamentals, and it remains a practical choice for basic room-temperature readouts, simple thermostats, and incubator or enclosure temperature monitoring where a project's microcontroller already has a free analog input and doesn't need multiple sensors sharing one wire the way a 1-Wire digital sensor would allow.