pothina_bala:
Hello,When I am Interfacing TDS/EC Sensor to Arduino ,I am getting some TDS value.
But When compare to arduino TDS values and TDS Meter values ,both are not matching
...
const float ArduinoVoltage = 5.00; // CHANGE THIS FOR 3.3v Arduinos
Unless you have latest version Yun Release 5, not matching is normal.
sonnyyu:
Arduino Yun 5v pin/USB port doesnt provide 5 volt.Arduino Yun 5v pin doesnt give me 5v. - #6 by sonnyyu - Arduino Yún - Arduino Forum
4.48 volt at 5v pin will cause some shield fail, and low voltage at USB port cause a lot of USB device fail.
Arduino Yun release 5 is fixed 5v pin/USB port problem, provide exactly 5 volt which I saw the demo at maker faire nyc yesterday.