A magnetic lock opens by magic

T1Covered by 1 source · first reported by Raspberry Pi / Arduino / Adafruit at 30 Oct, 14:55 UTC

Stephen Cass built a lockbox that opens only when the right gesture is traced with a magnet, and wrote it up for IEEE Spectrum. The sensor is SparkFun’s $100 magnetic imaging tile, a small-run board based on work by Peter Jansen. It carries an 8-by-8 grid of Hall-effect sensors that read both…