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Author Topic: Connect strain gauge transducer SPH  (Read 373 times)
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The situation is as follows:

withdrew from the Chinese weights up to 5kg's such a strain gauge

it is



Get the data weight need ...

Since the sensor has four wires ... apparently two input and two output

Connected to input GND via 10K and +3.3 v

Output is connected to the A0 and GND via 10K

sketch

Code:

int Pin = 0;  

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

void loop()
{
 
  val = analogRead(Pin);    
  Serial.println(val);
  
  delay(1000);
}

At the output of the monitor can see the figure 633-638

at a pressure strain gauge on the data does not change either as (((

Please advise how it can run and get the data correctly)
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Arduino - very interesting !
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Can the arduino read the output direct?  or do you need a transducer?
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Measurement changes behavior
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Strain gauge (or sometimes called  load cells) are a simple resistive network wired as a Wheatstone bridge. Two of the wires are for excitation of the bridge, you can use the arduino +5vdc regulated voltage and ground and the other two wires will output a low millivolt reading proportional to the strain. Such low millivolt readings are unsuitable for direct measurement of arduino analog input pins. One generally utilizes a precision differential operational op-amp to amplify the measurement to a voltage more suitable for an arduino. One can utilize the internal 1.1vdc band gap voltage reference for the arduino A/D function to make it more suitable for measuring lower voltage levels. Look around for example circuits and code.

Lefty
 
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