Electronics > Projects, Designs, and Technical Stuff

Hall sensor for reading magnetic tape

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StillTrying:
"having it touch it directly would be enough."

Yes hall should work down to DC - a stopped tape. But the +/- peaks of a recorded 1kHz would be only around 0.02mm apart, I don't think you could get the hall sensor to detect such small areas, it would be looking at many +/- peaks at the same time.

"Do you have any information on what the reasonable limits are?"

Not really, it's years since I last played with them. I always think these 3M magnetic tape viewers are interesting.
http://www.tapeheads.net/showthread.php?t=39958

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