Vibration sensor, RF-sending/receiving

Discussion in 'The Projects Forum' started by nerdegutta, Dec 16, 2009.

  1. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009

    I've built this:

    With success. When it detects vibration, the LED lights up.

    Now I want to improve it, by adding a radio sender to it. This is the idea:

    The vibration sensor, detects vibration, and instead of lighting the LED, I want it to send a radio signal. Approximately 100-200m. Another sensor, or radio receiver, picks up the signal, and is sending 2-5 v to an output pin. This pin is hooked up the the printerport of one of my computers, and is activating some software. The software part is no problem.

    Does someone have any suggestions on how to solve this little case?

    I was wondering to try this:

    but I'm not sure how to hook it up at the computer side.

  2. KL7AJ

    Senior Member

    Nov 4, 2008

    Since this is a simple ON/OFF signal, you could either write a parallel port or a serial port script to detect this. However, for a few bucks more and a lot less time you can get a USB port DAQ module such as what B&B Electronics sells, and not have to worry about writing interface code. This computer control and acquisition stuff is pretty addictive anyway, so you'll soon use the additional functions of a DAQ module. :)

  3. nerdegutta

    Thread Starter Moderator

    Dec 15, 2009
    I know, but the Christmas holidays are coming up, and between all the eating, and social gatherings with the family, I need some quality time alone... :)