The yoga breathalyzer is a breath visualization tool to help you understand and get in touch with your breathing. Breath is the basis of yoga and meditation, and this biofeedback tool is one way to develop a deeper understanding of your own breath. Using Arduino, a headset-mounted wind sensor, and an LED strip, it’s simple to translate your breathing into visual output.
This project was created at the Silicon Chef Women’s Hardware Hackathon by:
Step 1: Collect supplies
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For this project, you will need:
Soldering equipment, break-away header pins, and wire (rainbow cable works great)
Anemometer (wind sensor) such as this one: http://moderndevice.com/product/wind-sensor/
2 meters WS2812 LED strip, such as this one: http://www.adafruit.com/products/1138
Plastic cup and a single white sock (great use for that lonely sock that lost its partner)
9V DC barrel jack power source
A cup or bowl to cover the sensor so there’s no wind during calibration[/box]
Step 2: Solder wires to the wind sensor and LED strip
For the wind sensor, solder wires to the Gnd, +5V, Out, and Tmp contacts. We won’t be using the RV contact for this project, so it doesn’t matter whether you solder a wire to it. These wires should be at least 5 feet long, since they’ll need to stretch from the headset to the Arduino.
For the LED strip, solder wires to the three contacts (Gnd, +5V, and DIN). Note that these strips are directional — they have a right end and a wrong end to solder the data line to, although you could supply power to either end if you wanted to. So be sure to solder wires to the DIN (data in) and not the DO (data out) side.
At the opposite end of each wire, solder a breakaway header pin, so that the wires can be inserted into the Arduino. There should be a total of 7 wires, 4 from the wind sensor and 3 from the LED strip.
Step 3: Mount the sensor to the headset
Use zipties to secure the wind sensor onto the headset, attaching the wires up to the earpiece.
Step 4: Mount the LED strip onto the cup
Wrap the LED strip around a plastic cup and use clear packing tape to secure it in place. Cover the cup with a white sock; cut to size if necessary. This will diffuse the light from the LEDs.
Step 5: Load code
Download the code from https://github.com/biobonnie/YogaBreathalyzer
Also download and install the LED strip library from http://code.google.com/p/fastspi/
Connect the Arduino to your computer with a USB A-to-B cable and load the sketch.
For more detail: Yoga Breathalyzer