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Thread: Motor circuit with reverse

  1. #1
    Maximum Bitrate freestyler's Avatar
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    Motor circuit with reverse

    Hey all, looking for some help here.

    I want to build a circuit that when it gets power it will move a motor until it hits some sort of sensor. Then when power goes away it moves in reverse until it hits a sensor. I've been googling it but can't find too many good resources. If I can't figure this out I'd have to just use a toggle switch and stop the motor myself.

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    Variable Bitrate markland556's Avatar
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    you could do this with a few relays and some spst switches.
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    Maximum Bitrate kiltjim's Avatar
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    Ok, I'm fairly sure its way too late for this, but heres an icredibly easy to understand paint rendering

    The red box is a latching DPDT relay. The green liney thing on the left is a SPST relay, and the blue things are your switches to stop it from moving.

    Now, I'm not entirely sure it would work, but I'm not gonna worry about that now. Maybe tomorrow morning.
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    Variable Bitrate kamikaze2112's Avatar
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    while not quite sure what you are trying to accomplish and how, but i believe i read something somewhere that you could control a stepper motor via parallel port quite easily...

  5. #5
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    You can use a mini-SSC controller to run a servo. You can control how far it goes. If necessary, you can use a continuous rotation servo. The controller is accessible via VB and the serial port.

    What is the application of the motor?
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    Variable Bitrate markland556's Avatar
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    this circuit should work. it better both the switchs are normally closed even though the diagram doesnt look like it. M$ paint isnt really that good. And im watching blind-date right now so im kinda preoccupied.
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    Maximum Bitrate freestyler's Avatar
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    well i have two different applications for it, one for moving an LCD and the other is to possibly rotate an antenna

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    Maximum Bitrate freestyler's Avatar
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    Quote Originally Posted by markland556
    this circuit should work. it better both the switchs are normally closed even though the diagram doesnt look like it. M$ paint isnt really that good. And im watching blind-date right now so im kinda preoccupied.
    Could you explain this a little bit? Are those SPST or SPDT relays?

    Thanks.

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  9. #9
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    I tried building that circuit using SPST relays, it didn't work right.

    What I need is so that when you give it power the motor spins up, then when it hits the first switch it stops.

    When you kill the power to the circuit it spins in reverse until it hits the second switch.


    Back to the drawing board I guess, I burnt up one SPST relay though

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  10. #10
    Maximum Bitrate kiltjim's Avatar
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    Did you try mine? The SPST relay should stop the current, until the Accessory power is lost. Then the reset coil would become energized, and would run until the sensor was tripped. Then the whole thing would wait until the reset was triggered (power to ACC was lost) and would run until the second sensor was triggered.
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