NEW GUIDE: John Park’s Secret Hollow Book Intrusion Detector @adafruit @johnedgarpark #adafruit

Build your own safe hidden in plain sight to store valuables — and rig an intrusion detector with Circuit Playground Express! This new guide will teach you how.

The guide will show you how to make your own hollowed out book, and then build a simple alarm with a Circuit Playground Express, or, even set up the Haven app on an old Android phone, just like Snowden would want you to!

Trigger warning: a book gets destroyed in this project.