Easy 12v time relay help!

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mlawler0

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Hi all,

I am sure for most of you this would be a very simple project but I am very new. I want to run a very small 12 volt motor off a deep cell battery. I need the motor to turn on for 3-5 seconds (can this be adjustable) then turn off for approx 8 seconds.

The motor will be winding in a rope until the rope is completely in then releasing the rope back out, then pulling it back in, etc.

Thanks for your help in advance.

Mike
 
What condition makes the motor reverse? Are you counting turns of the capstan, or sensing the capstan being full of rope with a microswitch?
 
The other end of the rope has bungee that stretches as the motor winds it in.....when the motor stops the bungee pulls the rope back out.
 
You explained what you are doing to keep the rope taut on the capstan; I guess you are banking that the bungee can "free-wheel" the motor when power is removed?
 
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I guess its more difficult than i thought, there is a big ring that doesn't allow the rope to be drawn in any further but i am guessign if the motor continued to try to pull that would not be good.
 
mlawler0 said:
I guess its more difficult than i thought, there is a big ring that doesn't allow the rope to be drawn in any further but i am guessign if the motor continued to try to pull that would not be good.
Click to expand...

Reread my previous post again, I edited it while you where replying. After rereading the original post, I think you can do it without the limit switch, since the motor is whimpy...
 
This should do what you want. You will have to determine the polarity of the motor leads. I'm assuming the motor draws less than 1/4A.
 

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