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+ I like it. Welcome to the halfbakery.
I'm questioning the *instant and free* part, though. |
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to my mind such a system would be extremely costly to introduce in reality. perhaps, it could pay off in huge supermarkets where there are zillions of goods. |
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This would require all those tags to either contain batteries (which would need to be changed) or be connected to mains (which would be a bit of a wiring nightmare). Also goods are moved around on the shelves fairly often, perhaps just a few inches one way or another, but a cardboard tag is easy to relocate, will these be as simple? |
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An idea so wonderful it has already been done. See link. |
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