A source voltage is applied to the bridge at points 2 and 5 and output is measured at points 1 or 6, and 4. The MPS20N0040D pressure sensor is a bridge circuit where one of the bridge elements is a pressure-sensitive resistor. In Depth: How the MPS20N0040D Pressure Sensor Worksīasically, the MPS20N0040D measures the air or liquid pressure in its opening. Want to learn more about how the pressure sensor works? Read on below. Here’s an example sketch that displays the pressure in pascals in Serial Monitor: You can clone/download the library on this page and place it directly to the Documents/Arduino/libraries folder. Hence, I decided to create my own library that gives the output in pascals, mmHg, atm, and psi. However, the original HX711 library gives out raw ADC values and not pressure. The HX711 and HX710B are both 24-bit analog-to-digital converters and provide the same pulse outputs. No library specific for this pressure sensor exists but you can use the same HX711 library for weight sensors. Moreover, the Arduino’s 5V is enough to power the sensor module: Note that you can use any Arduino digital pin for the clock and data pins. A clock pin provides timing for that data, like other synchronous protocols. The pressure sensor conveniently sends out pulses according to the pressure data it reads. In a Rush: Wiring the Pressure Sensor to Arduino
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