Hello,Nowadays, i am working on the project that requires to retrieve negative temperature values.But the BOLT ADC pin has 1 Bit resolution in range 0 - 1V. So how could i read negative temperature from BOLT A0 pin using the LM35 sensor ?
@kashifofme I am not sure about the exact way forward but I believe that 0V may not correspond to 0 degree celsius. You could try keeping the sensor in a subzero temperature region and see what value it records. Let me know.
Here is a product built on Bolt https://www.boltiot.com/bthm.html that measures up to -50 celsius.
Hi kashifofme,Please read a datasheetA negative voltage is required for measurement at negative temperature using LM35.
Temperature sensors with analog output that do not need negative voltage exist.(ex.LM60, LM61)