Subject:
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Re: Voltage Sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 18 Sep 2002 13:31:33 GMT
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Viewed:
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518 times
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In lugnet.robotics, PeterBalch <PeterBalch@compuserve.com> writes:
> I presume you're using a 12V lead-acid or NiCd battery. As the battery
> discharges, the output voltage drops, slowly at first but then faster whe=
> n
> it gets close to being empty. By the time it reaches, say, 10V, it's time=
>
> to recharge it. So when you're monitoring batteries, you only bother with=
>
> the "top" few volts. The advantage of the "offset" is that you can apply
> the full range of the RCX input sensitivity to these "top" few volts and =
> so
> get better resolution. =
>
>
Thanks Peter,
Yes, it was brought to my attention that the useful portion of a 12V battery
is at the top end of the voltage range. I don't think I thought about it to
be honest - I guess the learning curve just keeps pointing up at this stage.
(Horst pointed out the increased resolution issue in a previous email)
Thanks for suggestions about the zener diode's. I guess there are many ways
to reach similar results.
Cheers
Tom Beattie
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Message is in Reply To:
 | | Re: Voltage Sensor
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| (...) I presume you're using a 12V lead-acid or NiCd battery. As the battery discharges, the output voltage drops, slowly at first but then faster when it gets close to being empty. By the time it reaches, say, 10V, it's time to recharge it. So when (...) (22 years ago, 18-Sep-02, to lugnet.robotics)
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