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Date: Thu, 6 Jun 2019 14:12:51 -0400
Reply-To: Donald Williams <[log in to unmask]>
From: Donald Williams <[log in to unmask]>
Message-ID: <[log in to unmask]>
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Sender: First Lego League in Virginia and DC <[log in to unmask]>
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It turns out that I looked at this and determined the problem to some
certainty:
https://urldefense.proofpoint.com/v2/url?u=https-3A__bricks.stackexchange.com_questions_10586_nxt-2Dsensors-2Dnot-2Dworking_10617-2310617&d=DwIFaQ&c=eLbWYnpnzycBCgmb7vCI4uqNEB9RSjOdn_5nBEmmeq0&r=k6Oa5GxfBPFMgGjb2r5QIoEOeBZs9xbNIpA0kLw_kFQ&m=dkDUq5VKEfYyoip9IBChFeuhGSyYH7Owpgt_vq8xerI&s=1UDSqDoCj7qP6mqsiF0PsrV1WUckGd-TfmqvMM8uweg&e=


Using a volt meter, and checking pins 3 and 4 with the robot ON, I was able
to tell that there was no voltage going to the sensor. I set the screen to
"View" > sensor > port # and checked the voltage. On a good robot, I get
near 4.5V. On my suspect robot, I get 0.02V.

Have any of you ever repaired a problem such as this?

Just sharing my experience with you, and looking for next step.


Donald Williams P.E.
Phoebus High School
100 Ireland Street
Hampton, VA 23663
757-727-1031




On Thu, Jun 6, 2019 at 12:48 PM Donald Williams <
[log in to unmask]> wrote:

> I haven't used the robots for a while and when I get them out, and I can
> write programs and load the programs onto 12 robots. 11 of the robots work
> fine, but one won't recognize the light or sound sensor. It recognizes a
> touch sensor. I have verified the sensors works by swapping sensors and
> cables with other  robots (multiple times, with another teacher who is an
> electrical engineer watching). If I try going to "View" the sensors (on the
> correct ports), I get a value of "0". I have reloaded the firmware.
>
> Any ideas?
>
>
> Donald Williams P.E.
> Phoebus High School
> 100 Ireland Street
> Hampton, VA 23663
> 757-727-1031
>
>
>

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