Instructables
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

 
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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.

Step 2: Order your parts!

Picture of Order your parts!
keyswitch.jpg
ohter parts.jpg
pushbutton.jpg
reed.jpg

As always, you can't build stuff without the correct parts. Here is my material list with example sellers for your convenience:

Ebay:

1x Arduino Uno (as programmer for Attiny85):http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Attiny85:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Reed Switch:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Key Switch:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x IC Socket: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x 12V Buzzer:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x BC547 NPN Transistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

4x 10kΩ, 1x 1kΩ, 1x 640Ω Resistor (1/4W):http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x 10µF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

2x 0,1µF(100nF) Capacitor:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Push Button:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x LM7805 (5V linear regulator):http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x DC Jack:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x PCB (striped) :http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Male Headers:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Female Headers:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1x Red LED 5mm: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...


Amazon.de:

1x Arduino Uno (as programmer for Attiny85): http://amzn.to/1tZNXjZ
1x Attiny85: http://amzn.to/1qKReWK

1x Reed Switch: http://amzn.to/1oO2b5Q

1x Key Switch: http://amzn.to/1oO2jCh

1x IC Socket: http://amzn.to/1tZPcQ0

1x 12V Buzzer: http://amzn.to/1qKSkSx

1x BC547 NPN Transistor: http://amzn.to/1tZPWVq

4x 10kΩ, 1x 1kΩ, 1x 640Ω Resistor (1/4W): http://amzn.to/1A2KZzi

2x 10µF Capacitor: http://amzn.to/1tZRcrz

2x 0,1µF(100nF) Capacitor: http://amzn.to/PD2jZj

1x Push Button: http://amzn.to/1qKUxgG

1x LM7805 (5V linear regulator): http://amzn.to/1qKUGAC

1x DC Jack: http://amzn.to/1oO2b5Q

1x PCB (striped) : http://amzn.to/1qKV2Hy

1x Male Headers: http://amzn.to/1qKVg1p

1x Female Headers: http://amzn.to/1tZTmHV

1x Red LED 5mm: http://amzn.to/1qKVuWm

Amazon.com:

1x Arduino Uno (as programmer for Attiny85): http://amzn.to/1BGO7iD

1x Attiny85: http://amzn.to/ZixmOf

1x Reed Switch: http://amzn.to/1BGOBVM

1x Key Switch: http://amzn.to/1EgGOCf

1x IC Socket: http://amzn.to/1EgGTG0

1x 12V Buzzer: http://amzn.to/1oIFpu8

1x BC547 NPN Transistor: http://amzn.to/1EgHLdT

4x 10kΩ, 1x 1kΩ, 1x 640Ω Resistor (1/4W):http://amzn.to/1upkTo4

2x 10µF Capacitor: http://amzn.to/ZizN3p

2x 0,1µF(100nF) Capacitor:http://amzn.to/1yFH4KK

1x Push Button: http://amzn.to/1EgI7kI

1x LM7805 (5V linear regulator):http://amzn.to/1n69hVK

1x DC Jack: http://amzn.to/1rYWQNd

1x PCB (striped) : http://amzn.to/1vElUHb

1x Male Headers: http://amzn.to/ZiC1Qm

1x Female Headers: http://amzn.to/Z4IZId

1x Red LED 5mm: http://amzn.to/1yFI9lN


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

Wyle_E4 months 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_RAVI4 months ago
you wrote simple but i say wonderful project..creative idea..nicely done..