Motion activated water sprayer

Discussion in 'The Projects Forum' started by comawhite, Dec 1, 2012.

  1. comawhite

    Thread Starter New Member

    Dec 1, 2012
    I am a complete noob when it comes to electronics, but would love to learn as a hobby.
    I would like to build a motion activated water sprayer, but have no clue as to the additional circuitry would be needed. Would anyone be able to help or point me in the right direction?

    Kind Regards,
  2. wayneh


    Sep 9, 2010
    luvv and #12 like this.
  3. elec_mech

    Senior Member

    Nov 12, 2008
    Welcome to AAC.

    We can certainly help, but we need a lot more information first.

    What kind of sprayer are you thinking about? A garden hose, a battery-powered sprayer, or something you plan to make yourself? If the latter, what are the voltage and current requirements of the pump motor?

    Here are some small battery-powered ones:

    What do you want it to do?

    You mentioned motion-activated, so how would you like it to operate? Think about it step-by-step. As an example:

    1) Motion detector, when triggered by movement, triggers sprayer - a) immediately, b) after a delay of xx seconds, c) other?
    2) Sprayer sprays for a) xx seconds, b) until motion detector stops detecting motion, c) other?
    3) Delay between motion detections? In other words, do you want the sprayer to remain off for xx seconds/minutes after it has sprayed once so multiple motion detections in a short period of time don't continue to trigger it?

    I just helped someone here do something similar with a PIR module from Parallax: