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kevinlohk / ArduinoPhMeter

Arduino PH Meter
http://www.mini-kossel.com/Arduino-PH-Meter-Project
GNU General Public License v2.0
14 stars 7 forks source link

The LM35 Volt out is amplified 3 times by CA3140, but why TempAverage / 3.4 ??? #4

Open Vincent-Pang opened 7 years ago

Vincent-Pang commented 7 years ago

Hi,

As the coding comment also stated that the LM35 Volt out is amplified 3 times by CA3140, the temperature should be TempValue = (double) TempAverage / 3.0 * (5/10.24); right???

Here is the current code in LCD_Keypad_Shield_with_PH_Meter.ino

 TempValue = (double) TempAverage / 3.4 * (5/10.24); // LM35 connect to CA3140 for amplify 3 time