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From Arduino to Final Product

Discussion in 'Electronic Design' started by Guilherme Utrabo, Mar 28, 2013.

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  1. I work with software for some years, but I'm completely noob on electronics.
    For my FYP though, I will have to build a device that looks like a watch, containing a GSR sensor (Galvanic Skin Response) and a Bluetooth transmitter to send the sensor data to another device.

    I found this option but the cost is $ 2000.00 the piece.

    The prototype can be made with Arduino and a Bluetooth shield, but once it's prototyped, I would like to transform it into a final product, using another micro controller like ARM or PIC. But the first question is: what will replace the Bluetooth shield?

    The next question is: what I'll have to build and what I'll have to buy (eg. micro controller)?

    Thanks for the help!

  2. Sjouke Burry

    Sjouke Burry Guest

    I saw a very nice circuit from NASA years ago, which very reliable
    and very low power transmitted a number of temperatures from an
    animal to a reciever outside a cage.
    The temperature was encoded in the "OFF" time of the transmittor,
    and the "ON" time of the transmittor was very short, and seperated
    the temperatures from each other.
    So make a oneshot with the skin voltage setting its time,~.1 to 1. sec,
    and a 20 micro second pulse, to tranmit a HF burst, something
    like 100MHZ,which can be very reliabley detected.
    The receiving computer needs only to measure the time.
    This can easely be extended to a multychannel system.
  3. Dennis,

    Is is possible to insert another sensor in the Chronos?
    If possible, that would save me a lot of time!
  4. Edward Lee

    Edward Lee Guest

    We have a similar idea, but probably just one outlet with plug-in
    adapter. They want multiple plugs all over the house anyway, so,
    multiple oulets at one place doesn't make much sense. Cost is the
    issue. It has to be less than $5 BOM.
    We use the Microchip Raven (PIC32MX/MRF24J40), but the RF circuit is
    tough to manufacture. Out of 10 prototype boards, 5 doesn't work with

    To OP: For watch size, you almost have to do direct die-bonding.
    Even QFN40 (MRF24J40) or QFN32(ATF86RF) are too big, not to mension
    the microcontroller and balun circuit.
  5. Jamie

    Jamie Guest

    You didn't? Stay tuned, he's just getting started!

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