Four-person project for DTU 34621. The build combines an ATmega328P, custom analog electronics, an H-bridge transmitter, and a concentric coil head.
The challenge
The weak receive signal had to be measured consistently against the transmitter. Coherent sampling and a single-bin DFT extract amplitude and phase in real time.
Results
- Metal detection with an OLED readout and proximity tone.
- 164 minutes of continuous operation recorded in a bench test.
- Custom PCBs and a printed control housing.
