Arduino: read water quality with the TDS module
Measure total dissolved solids with the Gravity TDS module on an Arduino: clean wiring, temperature compensation, calibration, and what TDS cannot tell you.
Tag
#analog
5 tutorials
ESP32: read sound level with an analog microphone module
Wire an analog microphone module (MAX4466 or LM393 sound sensor) to the ESP32's ADC and build an RMS sound level meter for clap triggers and noise logging.
ESP32: measure water quality (TDS) with the analog TDS sensor
Wire the analog TDS sensor module to an ESP32, convert ADC counts to ppm with temperature compensation, and calibrate against a known solution instead of guessing.
ESP32: analog read with the ADC, and why ADC2 is broken on Wi-Fi
Use the ESP32's 12-bit ADC to read a potentiometer or analog sensor. Includes the ADC2 vs Wi-Fi trap and the input-only pin caveat.
Arduino: read a potentiometer and print the value
Wire a 10k potentiometer to an Arduino analog pin and read its position with analogRead. The second project after blink.