Open-Source DIY Ghost Hunting Equipment
Build professional paranormal investigation tools for 50-75% less
All designs & code free. No black boxes.
ESP32 components from Amazon.
Step-by-step guides for all levels.
Learn how devices actually work.
Electromagnetic field detector with LED indicators. Perfect first project!
FM radio scanner with touchscreen interface for rapid frequency sweeping.
Environmental sensor to word mapping device with touchscreen and voice output. Supports 10,000+ word databases via microSD.
Radiating electromagnetic field detector with proximity alerts.
High-quality audio recorder optimized for capturing electronic voice phenomena.
Interactive environmental monitor with motion, EMF, and temperature sensors.
| Device | Commercial Price | DIY Cost | Your Savings | % Saved |
|---|---|---|---|---|
| Ovilus | $130-180 | $50-70 | $60-110 | 46-61% |
| K2 EMF Meter | $50-70 | $10-15 | $35-60 | 70-86% |
| Spirit Box | $70-120 | $25-40 | $30-95 | 43-79% |
| REM Pod | $80-130 | $25-40 | $40-105 | 50-81% |
| BooBuddy | $100-150 | $30-50 | $50-120 | 50-80% |
| TOTAL (5 devices) | $430-650 | $140-215 | $215-490 | 50-75% |
Build all 5 devices for less than the cost of 2 commercial ones!
Hall sensor detects magnetic fields → LED indicators light up based on strength
FM radio rapidly scans frequencies → Creates white noise from radio static
Environmental sensors (temp/pressure/humidity) → Hash values → Maps to word database
⚠️ Educational purposes only. All devices use basic sensors + software. No paranormal claims - we document how commercial equipment works and provide open-source alternatives.