I am trying so set up a 4 wire load cell to measure weight. I have it connected to a INA126P in amp and that is connected to the Arduino Uno. I am not detecting any response when I apply weight to the load cell, and I don't know what is going on. If anyone can help, I would greatly appreciate the advice.
There is no error description, no description how you tested it, no information what you expect and no description what you see.
Therefore it is impossible for us to give detailed answers.
A schematic is way more descriptive than your description.
A load cell output can be positive and negative. But your amplifier can process positvie input only.
If now the load cell offset voltage is negative it will output zero voltage.
Sorry, I am a relative EE newbie and absolute EDA Board newbie.
So, the code runs but it outputs "14" continuously. I applied a varying amount of weight to the Load cell and received no change. I swapped out the INA126P, the load cell, the gain resistor, reversed the polarity of the load cell, and tested the arduino. I also changed the reference voltage from ground to 2.5V using a voltage divider.
I am expecting the value to vary when you apply weight to the load cell. I know it is a 10-bit ADC so I am not expecting much precision, but I am getting no change at all.
I am attaching a schematic and images of the circuitry.
the resistors for the voltage divider are really 27 Ohms each? then the become hot. I´d use 100 Ohms each. Datasheet says this is degrading common mode rejection. I dot see a problem with your circuit.
I don´t see a mistake.
Please measure the voltages: wrt GND. directely with the voltmeter tip on the INA leg.
* VCC
* IN+
* IN-
* Output