• A brief note for sensor: puck has already built in magneto sensor. Having a moving part in your device with a magnet could be used to get that going... see attached cross cut. There is also a third Puck Placement option C: next to the Power Pack. Orientation and Placement and Relative Movement of Magnet in respect to Puck would have to be figured out experimentally.

    Making it water tight for up to ... meters include even more application fields. Spring has then to be from stainless steel and button needs holes to accommodate displacement on pressing replacement on releasing.

    'Communication' under water may have to be done differently... I'm pretty sure that water cuts back tremendously on range of BLE. But making some range test experiments would pretty quickly answer that (very low frequency / very long wave RF is probably not easy to achieve, since it would ask for very long antennas... may be a ferrite stick / bar /...? ...but that would be a totally different communication setup). So, if there is no RF communication at all, this are alternatives to check out:

    a) a time delayed programmed program is loaded before the devices get thrown into the water.
    b) communication could happen by pulse modulation of the lights emitting the information usually sent over BLE
    c) if the regular light does not make it, IR could make it with additional IR diodes and sensors (puck has already built in IR LED and Light sensitive LED, but they are most likely not be of use and adding light conducting channels into the device from multiple pint in the device's surface may not be feasible or work either.
    d) use sound - sea creatures like whales and dolphins do that all the time - using piezo / surface speakers and sensors.... different frequencies and modulation techniques would have to be evaluated...

    Anyway... enough of the dreaming... sw is on my brain burner...


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    • touchDevice.png
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