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:

    looks interesting, but can you add more door sensors?

  2. max says:

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

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