Replies to This Discussion

Permalink Reply by Bot Thoughts on January 31, 2012 at 6:58pm

Maybe the "expansion ports" on the blue board? Otherwise, I would think the 3-pin headers should have Vcc and GND (standard servo pinout) 

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Permalink Reply by Dany Rassam on January 31, 2012 at 7:05pm

Thanks for your help. Im going to go and solder my header pins onto the expansion ports and hopefully it will work. I will plug it into AN6. Just to confirm, this is the code I will be using:

 

int A6;

long anVolt, cm;

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

void loop()
{
  pinMode(A6, INPUT);
  anVolt = analogRead(A6);
  cm = anVolt/1024;
  Serial.print(cm);
  Serial.print("cm");
  Serial.println();
  delay(500);
}

 

is using A6 ok or should I use ADC6 or something different altogether?

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Permalink Reply by Bot Thoughts on January 31, 2012 at 7:47pm

According to this: http://arduino.cc/en/Tutorial/AnalogInputPins

You should remove the line "int A6;"

Because that sets up a variable A6 that will have initial value 0, so the pinMode() and analogRead() calls will attempt to operate on analog pin 0. A6, however, is an alias for analog pin 6. Or you could use 6. 

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Permalink Reply by Dany Rassam on January 31, 2012 at 8:16pm

Thanks alot!!!!!! It worked finally. Lifesaver is what you are

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Permalink Reply by Martin Szymanski on January 31, 2012 at 7:00pm

In the industrial workplace I work with 0 to 10 Volts DC or a 4 to 20 ma Loop. A 4 to 20 ma loop seeks. A 0 to 10 volt references to the voltage. Understand the power to reference might be different. Personally I like a power loop. The I2C has very high Impedance and is subject to adjacent RFI and EMI interference.

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Permalink Reply by Martin Szymanski on January 31, 2012 at 8:24pm

Such is defining inputs according to architecture. If it is analog then scale accordingly.

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