Motion Detector help

Discussion in 'General Electronics Chat' started by tidjane82, Nov 8, 2009.

  1. tidjane82

    Thread Starter New Member

    Nov 4, 2009
    Thank you very much for your reply. Since I'am doing a senior design, i have to build my own motion detector. I'am building a Crystal -locked ultrasonic motion detector with sensor that detect any movement fron 22 ft.I will add an alarm circuit as well. The principe is, anytime the alerm goes off by detecting a movement i would like to have a message send to my phone, or even better make a call to my phone so i will be alert. I was thinking about how to connect the the all system to my phone, may be using a computer or embedded system.
    Any suggestion is welcome attach is the motion detector design.

    AAC Fanatic!

    May 26, 2009
    Perhaps you could use the amplified output from the ultrasonic motion detector and put it into an op amp. When the op amp senses a change of current (produced by motion) it will activate the alarm. Or something of that sort. Remember that a good designer isn't based upon how complex his project can be, if fact it's quite the contrary. A good designer will complete the design in the simplest form possible and keep things inexpensive.