| |
In article <J7AuCz.GsB@lugnet.com>, Patrick Levy
<patrick@omiccron.com.br> writes
> I decide to start a new subject for this, because I just figured out the problem
> with my US sensor. Thanks to Philo advice, i did easily open the sensor and I
> found this broken wire connection.
Interesting, it did not seem easy to do, and as Lego have published the
circuit diagram I lost interest in doing so.
For the circuit information see the Hardware Developer Kit here:
http://mindstorms.lego.com/Overview/NXTreme.aspx
> So, when I connect this wire in the place it seems to belong, the US sensor
> start to measure the distances as expected, but when i get near from some object
> (9- inches), the measure get a little wrong (+/- 1 inch difference),
I think this is normal.
The sensor relies on reflected sound. Hard surfaces directly facing the
sensor work best. Angled surfaces or soft fabrics (e.g. a towel)
reflects very little sound in the correct direction.
> and it
> never measure anything beneath 3 inches (even if the sensor is just touching the
> wall).
Mine measures down to about 2 inches, perhaps this is related to the
sensor alignment that you mentioned before? Both transmitter & receiver
appear to accurately face directly out of the sensor holes.
> If anybody could tell me if this difference is expected, or if anybody already
> opened the sensor, please let me know if the wire connections are right.
I tried opening the sensor before, but did not manage to release the
cover. If I can get the cover off, (without needing a hacksaw!), I am
happy to take a photo of the inside.
Regards,
Tony
--
The NXT Step blog discusses the Lego Mindstorms NXT:
http://thenxtstep.blogspot.com/
|
|
Message is in Reply To:
3 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
