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Thread: Garage Door Open/Close sensor

  1. #1
    FLAC
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    Garage Door Open/Close sensor

    I'm working on making my garage doors automatically open/close when I pull up to them.

    What kind of sensor would I use to determine whether a garage door is opened or closed?
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  2. #2
    MySQL Error soundman98's Avatar
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    you could use a momentary switch with a actuator arm, or maybe a optical sensor near the top of the doors travel?

  3. #3
    What can I say? I like serial. Curiosity's Avatar
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    I use a magnetic reed sensor on mine. When the door is down, the magnet is next to the sensor.

  4. #4
    One Sharp Cheddar ThunderStick's Avatar
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    Use a reed switch or a capacitive proximity sensor.
    Both will work great. Optical sensors will get dirty and then read incorrectly, conventional switches (actuators or momentary) may also work but I like to keep things as simple as possible and read switches and prox sensors are about as simple as it gets and they work great for this type of application.
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  5. #5
    One Sharp Cheddar ThunderStick's Avatar
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    You should use two sensors, one at the top and one at the bottom. Then your opener can determine if the door made it all the way up or not. I know my piece of poop Wayne Dalton iDrive garage door opener acts up quite a bit in cold weather.
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  6. #6
    Fusion Brain Creator 2k1Toaster's Avatar
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    Just be glad you dont live by Norad. Garage door openers in our neighbourhood just randomly go up and down...
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  7. #7
    What can I say? I like serial. Curiosity's Avatar
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    Quote Originally Posted by ThunderStick View Post
    You should use two sensors, one at the top and one at the bottom. Then your opener can determine if the door made it all the way up or not. I know my piece of poop Wayne Dalton iDrive garage door opener acts up quite a bit in cold weather.
    LOL, my iDrive acted up the first winter about 6 or so years ago. Unhooked it and manually tried. There was a spot where it got stuck really hard! Sanded that down and never had a problem since. The old 1/2 HP must have tackled that before but it was a lot slower and louder.

    Back on topic

  8. #8
    Raw Wave
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    Due you use current sensing, or just crush kids, heads & obstacles? And cats.

  9. #9
    What can I say? I like serial. Curiosity's Avatar
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    You'd be surprised how many of them don't have current sensing. My old one would have popped a basketball, and that's why the motor burned up.

    I think he wants a sensor for an external circuit though. I used the reed switch, connected to a PIC that converts that to pulses on 2 outputs connected to optocouplers which are connected to a little X10 slimfire remote that my PC receives as on or off, along with an X10 PIR sensor out there so it knows if I'm coming or going.

    The hard part will be detecting the car as soon as it's in the driveway.

  10. #10
    Fusion Brain Creator 2k1Toaster's Avatar
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    Quote Originally Posted by Curiosity View Post
    The hard part will be detecting the car as soon as it's in the driveway.
    Magnetic induction loop? Seems simple to me!
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