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Is there a kind of a potentiometer that goes back to it's off position on it's own? like with a spring or something?

MasterLee · 56-60, M
MasterLee · 56-60, M
They make mechanical timers that literally move. From that you can have maybe a four bit controller that determines resistance through a series of connected resistors. You can then determine with mathemetical precision the intervals before shunting to pulled high to stop the resistance.
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MasterLee · 56-60, M
@lacsar chuckle ok
Livingwell · 61-69, M
There are turn switches like that but not potentiometers. And the rate is quite fast. What are you attempting to do?
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@Livingwell Yes, according to info I collected online the wattage is around 300 watts and current rating is 10 to 15A and goes up to 25A when idling or under heavy loads like climbing ramps or road bumps.
I ordered a speed control circuit like the one in this link
https://youtu.be/zbKLNyhTdxU
and it takes up to 40A of current rate and includes a potentiometer and a 3 position switch for forward and reverse.
So yea it looks like fashioning a spring is a really good idea, I'll try doing it using the wigwag potentiometer that is just a piece of plastic right now I think I can make it pull the potentiometer knob in a certain way so that it goes back to stop position once I release my grip on it.
It's just a matter of safety cuz the motor brakes when I deaccelerate it.
Livingwell · 61-69, M
@PiecingBabyFaceTogether You’ll not likely damage the pot with a small spring. You’re just bending one end of the spring around the edge. You might go through a few knobs to get the right fit with the spring. 😊
Livingwell · 61-69, M
Again... what are you trying to do? A circuit could be built to start at 100% voltage and ramp down to zero over a prescribed time. But that may not be what you want.
Livingwell · 61-69, M
@PiecingBabyFaceTogether Ok...that helped a lot. It is using a speed control board. The potentiometer is controlling a circuit that creates pulses to turn the driver transistors on. The longer the pulses, the faster the motor speed.

Now.. I think you can make an easy fix. Purchase a small coil spring that is larger in diameter than the shaft of the potentiometer. It needs to uncoil in a counter clockwise position for off, tension moving clockwise for on. The spring should have long “legs”. One leg can bent around the body of the potentiometer. the other can be bent at a 90 degree angle parallel to the shaft. Remove the knob and fit the spring to the body. Drill a small hole in the bottom of the knob. Fit the other end of the spring, trimmed to fit, into the hole. Now tighten the screw. This should do what you want. Full counter clockwise for off, clockwise for on.

Hope this helped.
@Livingwell thanks. Yea that helped but I can't fully picture your explanation in my head. Is there pictures or a diy to do it step by step?
Livingwell · 61-69, M
@PiecingBabyFaceTogether I can draw something up and send to you. ok?
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@lacsar well if u do then at least say something useful instead of being childish about it..
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Livingwell · 61-69, M
@lacsar I’m an electrical engineer for over 30 years. Several patents. Sorry if my fat finger misspelled. My dad once told me.. better to let others think you’re a fool than open your mouth and remove all doubt. You sure cleared that one up for us ...you arrogant ass. If you actually knew something you would help the kid out. Go back to your pitiful hole.

 
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