Here’s a DIY on how to make an alarm system in 3 minutes. We will use a loud buzzer and some magnetic switchs from Radio Shack to create a simple yet effective alarm system. We will throw in a LCD, keypad so we can alarm the alarm system using a 4-digit code and be able to see the system status using the LCD.
DIY Link
DIY Link [html]
2 Responses to DIY – Make an Alarm System in 3 minutes
Leave a Reply

Check out more interesting categories: DIY, DIY Zedomax.
looks interesting, but can you add more door sensors?
yes, you can add up to 49 door sensors if you wanted to.