O que você precisa
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So many goodies in one package! The Fitbit Flex comes with the following:
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Two adjustable wristbands: one large, one small
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Wireless sync dongle
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Charging cable
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The Flex tracker sports some cool tech specs, too.
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Bluetooth 4.0 syncing
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Memory to store 30 days of data
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5-day battery life
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With less effort than peeling an orange, we peel the Fitbit Flex tracker out of the flexible wrist strap.
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Although it seems like a small consideration, we appreciate how easy it is to separate the electronics from the wrist strap—the component most likely to wear out.
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Normally we would compare the device to other similar devices. Unfortunately, we don't really have much to compare the Flex to. How about a half dollar?
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The Flex may be slightly larger than a half dollar (though smaller than half a dollar bill), but it will cost you 200 of them.
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The back of the Flex reveals the model number, FB401, and provides a nice insertion arrow. It's not quite disassembly information, but it's something, right?
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The first things we notice on the Flex are the waterproof contacts. This is good news for those who might be sweating while wearing, or tearing down, the Flex.
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This tiny gizmo fits snugly in its USB charger when its lithium-polymer battery needs juice.
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With no visible point of entry, we figure the path to victory can be carved with judicious application of sharp tools.
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Our first extraction: the light guides for the LEDs that pass for a display on this slim, dare we say emaciated, unit.
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Next out is the Bluetooth antenna, used for communicating with devices and the accompanying dongle.
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To those of you following along at home: you don't need to chop up your PCB.
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P.S. Don't follow along at home.
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Ferramenta utilizada nesse passo:Rotary Tool$49.99-
Pulling components out through the top of the Flex worked for a little while, but it's time to get to the good stuff.
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Using our handy rotary tool, we cut through the plastic casing of the Flex tracker.
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Well hello there, Rico Suave! Peeling back the Flex's stylish plastic jacket reveals the components we've been looking for.
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The main board slides right away from the contact pins. Now we can get to the juicy bits.
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Small and encased in a thin sheet of metal tape, the battery is soldered to the motherboard. By this point, a replaceable battery is the least of our worries.
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We're getting some good vibrations from the prominent vibrator that functions as an alarm.
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This is how your vibrator works in your Fitbit Flex.
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Stuck right on to the front of the board we find a near field communications (NFC) antenna.
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The NFC tag enables a tap launch of the Flex tracker's associated mobile app with "select NFC-enabled Android devices."
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This little guy looks like a likely candidate for the NFC controller.
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We just couldn't keep our scalpels to ourselves, so we ripped into the Flex's dongle as well.
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Plastic aside, we get to the goodies.
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We quickly free the dongle board from the metal casing of the USB plug.
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Enough loligagging, let's cut to the chase. This diminutive USB board houses all of the hardware needed to communicate with the Flex — and your computer:
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Texas Instruments CC2540F128 2.4 GHz Bluetooth Low Energy SoC
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On the contact side:
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BLE Antenna
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USB connection contacts
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Fitbit Flex Repairability Score: 2 out of 10 (10 is easiest to repair)
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Solid waterproofing, no moving parts, and lightweight construction make the Flex a very durable device, with the potential to last a long time.
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The wrist strap is similarly constructed and can be easily replaced.
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It's impossible to open the device without destroying it or at least compromising the waterproofing, making internal repairs infeasible.
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The Flex's inaccessible (and non-replaceable) battery limits the life of the device.
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24 comentários
i also lost the cable charger, anybody know the 3 pin (positive negative) for fitbit. Any universal charger I can use?
look at the enlarged image... Left Pin is connected to the housing of the vibrator - this tells me its GND or Neg, center pin has a much thinner track on the PCB i would call it Data, right pin therefore looks like VCC+.
Sarah -
i also lost the cable charger, anybody know the 3 pin (positive negative) for fitbit. Any universal charger I can use and how?
Have you found out? Wish ifixit tore down the motherboard.
Peter -