It sounds like you’re asking about the — a popular DIY pulse induction metal detector project, often sold as a PCB + components kit.
Finally finished assembling the Surf PI 1.2 from the classic Silverdog / Geotech design. Got the PCB and component kit online. surf pi 1.2 kit
If you’re looking for an affordable PI project that actually works, the 1.2 kit is hard to beat. I paired it with a 8″ mono coil — air tests ~25cm on a gold ring. It sounds like you’re asking about the —
🔧 Build difficulty: Moderate — through-hole, but needs careful coil winding and shielding. ⚡ Sensitivity: Surprisingly good on small gold jewelry and deep coins in wet sand. 🔊 Audio: Simple but effective beep/blip on targets. 🌊 Use case: Excellent for beach / saltwater hunting (it’s based on the old Whites Surfmaster design). If you’re looking for an affordable PI project
Anyone else built one? Happy to share mods.
If you want a (e.g., for a forum, social media, or blog) announcing or reviewing this kit, here’s a ready-to-use example: Title: Just built the Surf PI 1.2 kit — my first pulse induction detector
Add a 2nd stage RC filter to the audio for smoother tones.
