LM35 is a temperature sensor that outputs an analog signal which is proportional to the instantaneous temperature. The output voltage can easily be interpreted to obtain a temperature reading in Celsius. The advantage of lm35 over thermistor is it does not require any external calibration. The coating also protects it from self-heating. Low cost (approximately…
Overheat/Overcooling circuit breaker using temp sensor (LM35) & comparator (LM339)
This simple project with easy to build electronic circuit is very useful to fight with problems like overheating or overcooling of electronic devices which in turn [[wysiwyg_imageupload::]]leads to their damage. This circuit automatically switches off the circuit in event of excess heating or excess cooling. With small modification it can work as both overheat circuit breaker and overcooling circuit breaker.This simple project has a circuit is based around the temperature sensor LM35, which senses the surrounding temperature and gives the corresponding voltage output at its output pin, its output voltage when multiplied by 100 gives the temperature sensed in degrees. By using this fact the reference can be set accordingly.