Subject:
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Re: Pullback RCX Car
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Sun, 26 Jan 2003 19:25:46 GMT
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Viewed:
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3666 times
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Interesting idea.
The idea of a pullback car is that you provide the energy, and store it in a
spring. How about a "real" pullback car that works like this:
The drive motor would be used as a generator during pullback, to charge a
capacitor. You could pull back several times to store additional charge.
Implementation would be to connect the motor to 10,000 microfarad capacitor,
through a spring loaded DPDT switch and diode. Build the switch so it is
depressed while you hold the car for pullback. During pullback, the motor
charges the capacitor through a diode. Then place the car on the ground and
let go. The switch returns to it's "normal" position, connecting the motor to
the capacitor. In this position the switch must reverse polarity to the motor.
The capacitor discharges through the motor, making the car go forward.
In lugnet.robotics.rcx, Øyvind Steinnes writes:
> Hello,
>
> I've just had an crazy but simple idea a few days back.
> I was looking at all the pullback cars from LEGO in the shop, and it strikes
> me that the only thing that pullback motor does is to first "charge" the
> motor (spring) with energy and then release the energy so the car leaps
> forward. And it just goes straight forward...
>
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Message is in Reply To:
 | | Pullback RCX Car
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| Hello, I've just had an crazy but simple idea a few days back. I was looking at all the pullback cars from LEGO in the shop, and it strikes me that the only thing that pullback motor does is to first "charge" the motor (spring) with energy and then (...) (22 years ago, 26-Jan-03, to lugnet.robotics.rcx)
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