Measure pressure with your Micro:bit! #Microbit

Dr H shared this project on Instructables

The following instructable describes a easy to build and inexpensive device to perform pressure measurements and demonstrate Boyle’s law, using the micro:bit in combination with the BMP280 pressure/temperature sensor.

Whereas this syringe/pressure sensor combination has already been described in one of my previous instructables, the combination with the micro:bit is offering new opportunities, e.g. for class room projects.

In addition, the number of descriptions of applications in which the micro:bit is used in combination with a I2C driven sensor are rather limited so far. I hope this instructable might be a starting point for other projects.

The device allows to perform quantitative air pressure measurements, and to display the results on the micro:bit LED array or on a connected computer, for the later using the serial monitor or serial plotter functions of the Arduino IDE. In addition you have a haptic feedback, as you will push or pull the plunger of the syringe yourself, and hereby feel the required power.

By default, the display allows you to estimate the pressure by the level indicator shown on the LED matrix. The serial plotter of the Arduino IDE allows to do the same, but with much better resolution (see video). More elaborate solutions are also available, e.g. in the Processing language. You also can display the precise measured values of pressure and temperature on the LED matrix after pressing the A or B buttons respectively, but the serial monitor of the Arduino IDE is much faster, allowing to display values in near real time.

Total costs and the technical skills required to build the device are rather low, so it could be a nice classroom project under supervision of a teacher. In addition the device could be a tool for STEM projects with focus on physics or used in other projects where a force or weight shall be transformed into a digital value.

See full project details here!

Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.

Join 7,500+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython in 2018 – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/

Maker Business — Despite multiple bankruptcies, RadioShack continues to find ways to keep the lights on

Wearables — Tape, meet 3D printing

Electronics — A few words on inductor resistance

Biohacking — Running Blades

Python for Microcontrollers — CircuitPython is officially awesome!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.