Just built the Surf PI 1.2 kit — my first pulse induction detector
The is a bare-bones printed circuit board (PCB) and component set based on the classic 1990s design by Dave Johnson (Barracuda) and later popularized by Silverdog. The "Surf" stands for "Surface" or "Surfmaster," indicating its heritage as a waterproof beach hunter. The "1.2" refers to the specific revision of the circuit board. surf pi 1.2 kit