I'm envisioning an electronics thing -- watch battery, minimal microcontroller, on-off switch, Bluetooth Low Energy chip -- which I can hang off my water bottle at the gym. When I run laps, my phone connects with the dingus, which raises a counter, then when I run past, it loses connection again.
I'm even beginning to imagine the case I can 3D-print for it.
I'm even beginning to imagine the case I can 3D-print for it.
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