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Wanted: Old polar T31/T61 heart rate sensors for school project
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Hi,
We need some old T31/T61 heart rate sensors for a school project. We aim to build a receiver so that a Raspberry Pi can pick up the heart rate signal, but we need an old sensor so that we can harvest the antenna.
Can pay postage or make an equivalent donation to charity
Thanks,
Greg
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Hi,
The ones I've seen are black, but if they work with a polar watch then they've probably got the right antenna. The T31 is an unencoded sensor. and the T61 is encoded, but as we just want the antenna we don't mind either.
Greg