His next action gives us a severe case of the heebie jeebies, as he clamps the PCB to a milling machine, and mills away the sides of the metal shield. At this point, we are not sure if the potting compound is for heat dissipation, or just to obfuscate reverse engineering. With all the flex pieces removed, he is left with the main part of the device - the rigid PCB with most parts potted under a metal shield filled with what appears to be a soft, grey compound. He uses a hot-air blower to cleanly separate the flex PCB parts attached to the rigid PCB. Using a combination of solvent to soften the glue at various points, and snips to cut off retaining plastic tabs, he manages to untangle the hybrid rigid-flex PCB assembly from its plastic-metal clam-shell. The main body holds the rest of the electronics, and can be easily removed by unscrewing the four corner screws. The back cover appears to have an antenna with touch-contact terminations without a connector. starts off by applying a solvent around the back cover to soften the glue, then works with his spudger to pry it open. The device does not have any external fasteners, with the back cover being held together with glue. Even if the device in particular does not interest you, the techniques he uses are very educational and will prove a useful addition to your skills. More worryingly, the app offers a slider which you can move to see how you will “look” if you have higher or lower body fat percentages.įortunately for us hardware hacker types, wanted to unlock all the secrets Amazon poured into this design. Amazon’s ML algorithms then calculate your body fat percentage. Amazon mentions that the photos are never retained and deleted from their servers once your 3D model is transferred back to the phone. Your front, back and side photos get uploaded to Amazon servers, get converted to a 3D model, and then downloaded back to your phone. The other is its use of your phone via the companion app, to take photos of you, preferably dressed in your undergarments. The device has a pair of microphones, which listen to the “tone” of your voice and report on your emotional state. We won’t delve much in to the pros and cons of the device, other than mention two features which have the potential to creep out most folks. It helps monitor your active and sleep states, keeps track of body fat, and reports your emotional state. Halo’s focus is more on health, rather than fitness. The device does not have any display at all, and any metrics that need to be displayed (heart rate, steps, calories, etc.) show up on the Halo phone app. Sometime around the middle of 2020, Amazon jumped on to the health and fitness tracker space with the introduction of the Halo - a $100 device with an add on $4 monthly subscription service if you wanted additional features, which Amazon calls “labs”, many of which are third-party services. wanted to know what hardware was under the hood, and did an amazing Amazon Halo Teardown.
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