Deep breathing isn't only for mindfulness, it's for sending MIDI CC messages too. You can build a MIDI breath controller with a BMP585 air pressure sensor. This particular sensor has a port that you can attach a tube to for targeted pressure readings. In this scenario, the sensor is attached to a QT Py RP2040 running CircuitPython code that maps a pressure reading range to MIDI CC message values.
Use the rotary encoder to switch which MIDI CC message is sent from the controller. The NeoPixel LED light acts as an indicator.
What a cutie pie! Or is it... a QT Py? This diminutive dev board comes with one of our new favorite chip, the RP2040. It's been made famous in the new
guides with product
$9.95
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Bosch has been a leader in barometric pressure sensors, from the BMP085.
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Rotary encoders are soooo much fun! Twist em this way, then twist them that way. Unlike potentiometers, they go all the way around and often have little detents for tactile feedback....
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Oh say can you seeBy the knob's early light...Sorry - we thought that...
$0.50
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This 4-wire cable is a little over 100mm / 4" long and fitted with JST-SH female 4-pin connectors on both ends. Compared with the chunkier JST-PH these are 1mm pitch instead of...
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As technology changes and adapts, so does Adafruit. This USB Type A to Type C cable will help you with the transition to USB C, even if you're still...
$4.95
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McMaster-Carr sells food grade tubing that works really well for this project:
1 x
Odor-Resistant Soft Rubber Tubing for Food and Beverage
1/8" inner diameter, 1/4" outer diameter
Page last edited March 02, 2026
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