Subject:
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Re: My robot was the most fun
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Mon, 24 Feb 2003 19:11:29 GMT
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Viewed:
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492 times
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Mario DeFacendis wrote:
>
> In lugnet.org.ca.rtltoronto, Calum Tsang writes:
> > PS-the capacitor drives the micromotor for AGES!
>
> Really? I'm surprised... it looked so small in the unopened bag. What's
> its capacitance?
>
> Mario
1 F
Yup. A Farad. The unit you're *used* to seeing with greek letters in
front of it.
Now, the cap has a voltage rating of 2.5 V. Someone with more
electronics than I can explain what this means. But 1 F = 1 C / V, and
a Coloumb is an Amp for a second; so we're talking enough energy to make
a small vacuum cleaner go for a second, here.
Oh - I wound it up using a motor, until the "full" light lit. It turned
a 9v motor (RIS 1.0 style) with a z40 gear crank for just a little over
37 minutes with no load.
Yup, more than half an hour. Motor goes fairly slowly, but (at least at
first) it's got some torque.
Jeff E
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