Instead of using an expensive logger, I'd like to measure and log temperature using a PC microphone port.
I'm going to use TMP36 Temperature Sensor. The output voltage of the sensor is measured by the mic port. The voltage is supplied from a USB port.
Here is the diagram.
But here are my concerns:
- the mic port might have a certain range of voltage it can measure
- the accuracy of voltage the port can measure might be impractical
- Windows might not have the feature to measure the voltage directly
Is it possible?
EDIT 2018-02-14 9:36
My huge misunderstanding was the mic port can measure any kind of voltage generated by a mic to detect sound. Here are what I learned from the comments and answers.
- The mic port will likely be AC-coupled (i.e. for AC signals only)
- There might be other obstacles (e.g. low frequency cut)
- So what I planned is hardly feasible
- To measure voltage by a mic port, you need to build a certain circuit or use a frequency converter
- It might be better to take other options such as Arduino Nano clones(~$3.50 on eBay)