Basic Design

A project log for Arduino Controlled Car Alarm

Car alarm controllers are relatively expensive, when they could be replaced by a Arduino or other micro controller

Mike HendricksMike Hendricks 08/20/2014 at 08:100 Comments

Connect the car alarm trigger lines to the Arduino digital input pins. For each of these add a pull up resistor connected to the 5v line. Make sure your 12v and 5v share a common ground. Every Car alarm needs a blinking led on the dash to tell you that its armed, so we will add one of those as well.