BioFeedback Using Air - Sensor _BioFeedback Using Air - Sensor

BioFeedback Using Air – Sensor

This project runs on an Arduino Nano with a microSD card socket connected to it .

1. Gather or Order Parts

microSD socket
Arduino Metro Nano
The SD card is connected to the Arduino via the SPI bus (pins 10, 11, 12, 13 on the Ardun).
The pressure sensor is connected to one of the analog inputs (configurable in the code) . My sketch reads the sensor every few seconds and records the value to the microSD card.
You an use quick tie (nylon cable tie) to cinch off and seal one end of the silicone tube.
Do this before connecting the other end to the sensor, so that pressure inside the tube is roughly the same as the room.

About the Sensor

This pressure sensor is special because it comes with a metal port! Unlike other pressure sensors, you can easily attach a tube to it, to measure air pressure inside a close space.

This would be a great sensor for use with making DIY assistive tech “Sip & Puff” interfaces, or measuring the pressure within a vacuum chamber or other pressurized container.

Unlike most ported pressure sensors, this one uses I2C, it’s really easy to use with any microcontroller. Inside is a silicone-gel covered pressure sensing gauge with a pre-calibrated and compensated 24 bit ADC. We have example code and libraries for Arduino or CircuitPython/Python. You can measure absolute pressure 0 to 25 PSI, which is a great range since ambient pressure here on Earth is about 14.5 PSI.

The port is made of stainless steel and is 3.7mm long and 2.5mm diameter. It doesn’t come with tubing so be sure to purchase some tubing to attach to the port.

The sensor on a breakout board with 3.3V power regulation and level shifting so you can use it with any kind of microcontroller or microcomputer, from an Arduino compatible to Raspberry Pi

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