If you want to connect the LCD display with out I2C refer the below article link. LM35 gives analog output voltage which is proportional to temperature and operates for a range of temperatures between -55 to 150 degree Celsius.Ī 16X2 I2c LCD display is connected to 5V and GND with Arduino 5V and GND and the I2c pins SDA and SCL of LCD module are connected to A4 and A5 respectively. Interface all the required components according to the circuit diagram shown below.įrom the above Schematic diagram you can see the LM35 temperature sensor Signal pin is connected to Arduino to A0 of Arduino and Vin and GND are connected to 5V and GND respectively. You can change the minimum and maximum temperature values in the code according to your requirement so the fan speed adjusts according to them. User can easily monitor the temperature values in Celsius and fan speed in percentage on the LCD display module connected with Arduino.
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