Oura Ring Teardown (Gen 3 and 2)

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2022-04-17 | By bekathwia

License: Attribution-NonCommercial-ShareAlike

I took apart the Oura Ring - both gen 3 and gen 2 devices. This wearable tracks your heart rate and movement and especially focuses on sleep tracking. The folks at Lumafield were kind enough to scan the rings and charging base before I hacked at them with cutting tools, so we can look at the inside of the device through digital imaging as well as under a microscope. Thanks to David Cranor for lending his electrical engineering expertise.

Tools used in this teardown:

Parts we could identify on the Gen 2 Oura ring:

Crystal Oscillator AЯO9C
Cyrstal Oscollator T320 Px55
Battery Management IC - Texas Instruments BQ25120A
2x Photodiodes
2x Green LEDs
Multi-chip LED - Red, Infrared

gen 2

Parts we could identify on the Gen 3 Oura ring:

3.7V 16mAh Lithium Battery - Grepow YE160723G
2x Photodiodes
2x Green LEDs
Multi-chip LED - Red, Infrared

gen 3

Parts we could identify on the charging base:

Crystal Resonator 13.5 A4L
Microcontroller
Flat Flex Connector

You can take a look at the CT scan of the Oura ring charging base on the Lumafield site (free account required). The scans of the rings required too much cleanup to make public.

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