Picture of Simple Basement Security System

In this project I will show you how to build a very simple security system for all kinds of rooms. It might be simple but still effective. It is based around an Attiny85 and uses a reed switch and a key switch as inputs to see whether an intruder has accessed the room. A buzzer will then notify you or other persons. Let's build it

Step 1: Watch the video!

The video gives you all information to build this simple security system. But I will cover the most important steps again.


Now no one will ever sneak up on me again!! XD

Wyle_E1 year ago

I used to install burglar alarms, and my first reaction to this was "This doesn't need a microcontroller, just a couple of relays." Then I realized that the Attiny costs less than one of the relays.

BLR_RAVI1 year ago
you wrote simple but i say wonderful project..creative idea..nicely done..