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1  Using Arduino / Sensors / Strain Gage Amplifier for Arduino Uno on: June 28, 2012, 11:15:10 am
I am trying to input force transducer data into an Arduino Uno that is connected to a Laptop via USB and have followed the example posted by.

http://cerulean.dk/words/?page_id=42

It is an INA125P and when I measure the its output, which is Analog 0, with a mulitmeter, I see a response to applied loads on the load cell.  I am using a sketch that was previously written for this Arduino and a different amplifier and it works, but is non-linear (hence my desire to try a new Amp circuit).  When I run the sketch, I do not see any change in the Bits with applied load only 1028bits.

The cerulean post images do not show any connection to the Aref pin on the arduino, but the author mentions "playing with it".

Please see his first drawing to see how we are wired.

Here is out sketch.

int currentSensor = 0;

void setup() {
  analogReference(EXTERNAL);
  Serial.begin(9600);
}

void loop() {
 
    Serial.print('@');
    Serial.print(analogRead(0));
    Serial.print(',');
    Serial.print(analogRead(1));
    Serial.println('@');
 
    delay(100);
}
Thanks!
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