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Small automatic gate

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  • 27-09-2012 12:19pm
    #1
    Thunderbird2
    Closed Accounts Posts: 1,250 ✭✭✭


    Hi guys , hoping someone out there can help . I've made a small automatic gate using an drill motor and an articulated arm. It applies enough force to move the gate without being dangerous .
    I'm trying to make a circuit that allows the motor to run for 6-7 seconds then stop , wait for ten seconds then reverse for another 6-7 seconds and stop again .
    I'm trying to not use limit switches to break the circuit as the gate needs to be able to be pushed open or closed
    I've had some ideas of using a wireless doorbell to activate the relay for the duration of the tone being played .. I have a 555 timer chip and some transistors, capacitors, relays , Reed switches ect
    Any help is greatly appreciated :-)


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    #2
    meercat
    Registered Users Posts: 4,745 ✭✭✭meercat


    wheres robbie??????


    reminds me of this thread though

    http://www.boards.ie/vbulletin/showthread.php?t=2056719203


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    #3
    meercat
    Registered Users Posts: 4,745 ✭✭✭meercat


    just realized its you

    how them chickens doing??:D


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    #4
    Thunderbird2
    Closed Accounts Posts: 1,250 ✭✭✭Thunderbird2


    Haha there doing great :-) the door is going strong through wind and all the rain ;)
    This new yoke is for halloween :-)


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    #5
    meercat
    Registered Users Posts: 4,745 ✭✭✭meercat


    maybe the motor on some sort of cam to open and close gate(with loose spring attached)


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    #6
    Thunderbird2
    Closed Accounts Posts: 1,250 ✭✭✭Thunderbird2


    The gate opens and closes fine , I have it connected up to a battery .. Can you get magnetic reed switches that open the circuit when the magnet is applied ? Or is there some way of messing about with a typical reed switch to make it work this way ?


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    #7
    Thunderbird2
    Closed Accounts Posts: 1,250 ✭✭✭Thunderbird2


    Anyone :/


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    #8
    gerryo
    Registered Users Posts: 498 ✭✭gerryo


    Thunderbird2 wrote: »
    The gate opens and closes fine , I have it connected up to a battery .. Can you get magnetic reed switches that open the circuit when the magnet is applied ? Or is there some way of messing about with a typical reed switch to make it work this way ?

    I don't think reed switches can be opened by applying a magnet, but you could use it to control a relay that reverses the polarity to the gate motor.
    Maybe make a really slow bistable multivibrator, triggered to reverse polarity by the reed switches closing as the gate opens & closes.
    Might be possible to do it with just relays & reed switches if the reeds can handle the current.

    100's of ways of doing this, but if you keep it simple it's more reliable.


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