![]() The room temperature is 19 Celsius which means the LM35 supplies 190 millivolts, or. That is there because the LM35 supplies 10 millivolts per degrees Celsius. However, that doesn’t explain the 100 in his formula. So our count of 512 would give (512 * 5volts / 1024) and tell us that there is 2.5volts on the sample pin. To get the find the sample voltage from a digital number the formula is reversed (Digital number * supply voltage / 1024). The formula (Sample Voltage * 1024 / Supply voltage) shows that 2.5volts * 1024 / 5volts would result in a digital number of 512 which is what we would expect for a voltage half the supply voltage. The Analog to Digital Converter (ADC) compares a sample voltage to the supply voltage and provides a digital number based on 1024 steps. Here is the Arduino Code, just upload it and check the Serial Communication Option.Īnything just ask!!! Posted in Arduino, Electronics, Engineering, Hardware, Howto Post navigation Just connect the 5V output from Arduino to the 1st pin of the sensor, ground the 3rd pin and the 2nd one, you connect to the 0 Analog Input.ĭown goes some pictures that may help you, click to enlarge: LM35 Precision Centigrade Temperature Sensor, you can get from any electronic store.Arduino (You can use other microcontroller, but then you will need to change the code).I’m planning to build a temperature sensor with max/min + clock + LCD, and when I get it done, I will post here. The circuit will send serial information about the temperature so you can use on your computer, change the code as you will. Today I am going to show you how to build a simple temperature sensor using one LM35 Precision Temperature Sensor and Arduino, so you can hookup on your future projects. This semester was really busy, I didn’t have time to much else, but soon I will have my winter holiday (Here in the south our summer holiday is from December to February). Hello people, it’s been a while since I have posted projects on this website. ![]()
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