LM35 Temperature Sensor

LM35 Temperature Sensor The LM35 is a precision analog temperature sensor used to measure temperature in electronic and embedded systems. It provides an analog voltage output that is directly proportional to the temperature in Celsius. Key Features: - Temperature range: approximately -55°C to +150°C - Operating voltage: typically 4V to 30V - Output scale: 10 mV per °C - Accuracy: approximately ±0.5°C at room temperature - Low power consumption - Analog output - Easy to interface with microcontrollers such as ESP32 Working Principle: The LM35 produces an output voltage of 10 mV for every 1°C increase in temperature. Formula: Temperature (°C) = Vout (mV) / 10 For example: 25°C = 250 mV = 0.25 V 30°C = 300 mV = 0.30 V 50°C = 500 mV = 0.50 V Application in the ESP32 Prototype: The LM35 can be used to monitor the temperature of the mini 5G base-station model. The ESP32 reads the analog voltage from the LM35 and converts it into temperature. The measured temperature can then be used by the control system to determine whether the cooling fan should be turned on or its speed should be increased.