DIY – Make an Alarm System in 3 minutes

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

1. cattriena says:

   August 19, 2006 at 6:17 pm

   looks interesting, but can you add more door sensors?
2. max says:

   August 20, 2006 at 5:11 am

   yes, you can add up to 49 door sensors if you wanted to.