The 74HC4051 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL).
The 74HC4051 IC can be used to expand the single ADC input port of the ESP8266, to 8 ports.
The ESP8266 comes with a 10bit ADC, 0 to 1V, the datasheet doesn't tell much more than this about the internal analog converter.
The output pin of the 74HC4051 is controller by 3 pins, by setting those pins high or low an analog input of the 74HC4051 is selected.
It can be driven by the same 3.3V that powers up the ESP8266.
This library was developed on Atom+PlatformIO, compiled esp8266/Arduino.
Code
Notes
- read risk disclaimer
- excuse my bad english