How metal detectors work (400–600 words)
| Feature | Vintage (1985 Fisher 1266X) | Modern (2020 Minelab Equinox) | | :--- | :--- | :--- | | | Discrete transistors and a handful of ICs. | Multi-layer SMD with an ARM processor. | | PDF Value | Full schematics available. Repair possible. | Block diagrams only. Proprietary firmware. | | Coil Info | Inductance and wire gauge listed. | "Smart Coil" with EEPROM; no analog data. | | Best For | Learning analog physics. | Understanding digital signal processing (DSP). | inside the metal detector pdf
Empty your pockets before approaching. Walk through slowly and steadily. Do not pause or lean against the sides. How metal detectors work (400–600 words) | Feature