I am using the honeywell TSCDLNN100PGUCV pressure sensor in a project I am working on. I am using it with an Arduino Mega and I am having issues getting a readout from the sensor that can be used as a pressure. I am attaching the image given in the datasheet as well as a link to the sensor on Mouser. I am not sure if I have it wired incorrectly? I have tried both with and without the Op amp and cannot get a reading. I have pins 1 and 3 attached to ground and Vsupp at 5V. The remaining voltage out pins are 2 and 4 with V out positive and negative. I have both of these V outs plugged into the analog pins of the Arduino to read the voltage difference to get pressure. I have also wired the sensor various ways to try and get that voltage difference across the sensor, and am getting no variation under different pressures. Is my basic circuits knowledge at fault here? Have I wired this in an incorrect manor and making a simple mistake?
I always thought the arduino can only measure positive voltages...
You seem to have a sensor without buildin instrumentation amplifier.
They can't be used directly with an Arduino.
You can build an instrumentation amp with opamps, or use a HX711 breakout board.
But both options will be difficult to get right.
Better buy a pressure sensor with buildin instrumentation amp.
Leo..