need high(er) resolution/multiple input ADC recommendation
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I have a need to read multiple (let's say, 4) 1MOhm (@25C) thermistors. The range of resistance for these is from 2-3MOhm at the lower end down to about 500R at the upper end and the differences in resistance at the outsides is minimal. This is what a plot if their curve looks like:
![Image](http://brian.interlinx.bc.ca/thermistor%20graph.png)
Given the limitation of the ESP8266's a single analog input and it being only 10-bit I am looking for an ADC multiplexer with something better than 10-bit resolution that I can read with a NodeMCU module.
Any suggestions?
![Image](http://brian.interlinx.bc.ca/thermistor%20graph.png)
Given the limitation of the ESP8266's a single analog input and it being only 10-bit I am looking for an ADC multiplexer with something better than 10-bit resolution that I can read with a NodeMCU module.
Any suggestions?