Build a Hidden Lock With a Magnetic Imager
The author explores the concept of hidden locks inspired by locksmith practices and magnetic lock technology. Rather than using a simple magnet-based system vulnerable to guessing, they designed a more sophisticated lock using SparkFun's magnetic imaging tile, discrete components, a servo motor, and a Teensy microcontroller. The system detects patterns using Hall-effect sensors, enabling gesture-based access control.
Key points
- Uses magnetic imaging tile instead of simple magnet-based locks
- Programmable secret gesture replaces fixed RFID card requirement
- Combines Hall-effect sensors with microcontroller for pattern recognition
Summary and key points written by AI from the headline and a short excerpt, so they can be incomplete or wrong. IEEE Spectrum did the reporting; read the original for the full story.
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