RFID signal strength

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some friends , working on arduino project class in school. trying make arduino robot uses rfid tag find keys, go keys, , let off alarm when keys found. possible tell if arduino getting closer tag (like hot cold type idea) know robot heading in right direction?

see discussion: http://stackoverflow.com/questions/14237110/calculate-distance-to-rfid-tag


Arduino Forum > Using Arduino > Project Guidance > RFID signal strength


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