Surf Pi 1.2 Kit May 2026

Add a 2nd stage RC filter to the audio for smoother tones.

🔧 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). surf pi 1.2 kit

It sounds like you’re asking about the — a popular DIY pulse induction metal detector project, often sold as a PCB + components kit. Add a 2nd stage RC filter to the audio for smoother tones

Anyone else built one? Happy to share mods. 🔊 Audio: Simple but effective beep/blip on targets

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.

Finally finished assembling the Surf PI 1.2 from the classic Silverdog / Geotech design. Got the PCB and component kit online.