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Part NumberPart VendorCostQuantityTotalLinkNotes
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1IMU*Adafruit$14.955$74.75
https://www.adafruit.com/product/4502
One IMU is needed for each body segment you wish to track.
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2Raspberry Pi 4 (4GB RAM)Adafruit$55.001$55.00
https://www.adafruit.com/product/4296
The 4GB version was used for development, other versions may work but are not supported.
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3USB cableAdafruit$2.951$2.95
https://www.adafruit.com/product/4472
This cable connects the USB port of the battery to the USB-C power port on the Raspberry Pi.
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4Rechargeable BatteryAmazon$12.501$12.50
https://www.amazon.com/gp/product/B07MS1B8KQ/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1
Any rechargeable battery that outputs 3A at 5V should work well.
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532GB MicroSDAmazon$10.491$10.49
https://www.amazon.com/Micro-Center-Class-Memory-Adapter/dp/B07K81Z6DF/ref=sr_1_5?dchild=1&keywords=32GB+micro+SD+card&qid=1591198225&sr=8-5
The specific size of 32GB is needed to load the pre-built operating system for the Pi.
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6VelcroAmazon$7.951$7.95
https://www.amazon.com/Strenco-Inch-Self-Adhesive-Hook/dp/B00FQ937NM/ref=sr_1_1_sspa?dchild=1&keywords=velcro&qid=1591198353&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzUUFONzhPNVRXVElHJmVuY3J5cHRlZElkPUEwODczNDkyMlRLQ1BYS1dBOUYyRyZlbmNyeXB0ZWRBZElkPUEwMjAwOTQxVVNKTVE0S1dCTk0yJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
The velcro is applied to adhere the IMUs to straps and the battery to the belt.
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7Calf strapsAmazon$8.502$17.00
https://www.amazon.com/JKJF-Cycling-Trousers-Adjustable-Fastening/dp/B07WZ86RF1/ref=sr_1_2?dchild=1&keywords=Velcro+Pant+Strap&qid=1591198659&sr=8-2
These straps are useful for attaching IMUs to the legs and arms.
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9BeltAmazon$4.951$4.95
https://www.amazon.com/gp/product/B07XHS2PGY/ref=ox_sc_act_title_1?smid=AUKX0J48DAJTG&psc=1
The belt mounts the Raspberry Pi and batery.
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10Case/FanAmazon$8.991$8.99
https://www.amazon.com/MazerPi-Raspberry-Cooling-Heatsink-Model/dp/B07W3ZMVP1/ref=sr_1_4?dchild=1
This offers the cooling and mounting for the Raspberry Pi and sensors.
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11Qwiic Pi HeaderSparkfun$5.951$5.95
https://www.sparkfun.com/products/15945
This header connects the Qwiic multiplexer to the Raspberry Pi.
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12Qwiic MultiplexerSparkfun$11.951$11.95
https://www.sparkfun.com/products/16784
The multiplexer connects the IMUs to the Raspberry Pi with pre-made Qwiic cables.
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13Qwiic cable 1Sparkfun$1.954$7.80
https://www.sparkfun.com/products/14429
These cables connect the IMU to the multiplexer. Select the number and lengths appropriate to mount IMUs to the body segments you wish to track.
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14Qwiic cable 2Sparkfun$1.501$1.50
https://www.sparkfun.com/products/14428
These cables connect the IMU to the multiplexer. Select the number and lengths appropriate to mount IMUs to the body segments you wish to track.
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15Qwiic cable 3Sparkfun$1.501$1.50
https://www.sparkfun.com/products/14427
These cables connect the IMU to the multiplexer. Select the number and lengths appropriate to mount IMUs to the body segments you wish to track.
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16Qwiic connectorsSparkfun$1.501$1.50
https://www.sparkfun.com/products/14495
These are optional but allow for multiple cables to be connected to create arbitrarily long cables.
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17Qwiic button/ledSparkfun$3.951$3.95
https://www.sparkfun.com/products/15932
The button/LED act as an interface to start/stop recordings.
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TOTAL:$228.73
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Optional
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Zip ties
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Push buttons
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*We have added support for two additional types of IMUs: LSM6DS33 and LSM6DSO32
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LSM6DS33:
https://www.adafruit.com/product/4480
LSM6DSO32:
https://www.adafruit.com/product/4692
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