N-Channel IRFS3806 V_DS (Drain-Source Voltage): 60V I_D (Continuous Drain Current): 43A R_DS(on) (On-Resistance): Very low, around 0.0045Ω Package: D2PAK (Surface-mount)

Pulse induction metal detector using an Arduino Nano, TC4420-driven IRF3205 coil switch, TL072 analog gain stages, LM393 detection comparator, 12V input power, and buzzer alert, optimized for low-noise sensing and separated analog/power grounds.