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It's been a long time since I posted anything new here. It's good to be back.
I just added a big article on building an Input Multiplexer and Color Sensor for
the RCX to my website: http://www.plazaearth.com/usr/gasperi/lego.htm .
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Mike!
Good to see some of the old Extreme Team back in action. Where have
you been?
Cheers, Ralph
Michael Gasperi wrote:
> It's been a long time since I posted anything new here. It's good to be back.
>
> I just added a big article on building an Input Multiplexer and Color Sensor for
> the RCX to my website: http://www.plazaearth.com/usr/gasperi/lego.htm .
>
>
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In lugnet.robotics, Ralph Hempel wrote:
> Mike!
>
> Good to see some of the old Extreme Team back in action. Where have
> you been?
Extreme midlife crisis.
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In lugnet.robotics, Michael Gasperi wrote:
> In lugnet.robotics, Ralph Hempel wrote:
> > Mike!
> >
> > Good to see some of the old Extreme Team back in action. Where have
> > you been?
>
> Extreme midlife crisis.
Hi Mike, hi Ralph,
Good to hear you again. I'm >45 and do know exactly what you are talking about
Mike.
Now to the sensor : this simply is a great piece of electronics for the RCX that
I would warmly recommend. It may be used for many exciting projects. One
application of the multiplexer may be found with our GASTON project
http://www.convict.lu/Jeunes/Gaston/User_guide.htm
http://www.convict.lu/Jeunes/Gaston/4_Special_components.htm
where we needed an input-extension to gain functionality.
Regards,
Claude
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In lugnet.robotics, Michael Gasperi wrote:
> It's been a long time since I posted anything new here. It's good to be back.
>
> I just added a big article on building an Input Multiplexer and Color Sensor for
> the RCX to my website: http://www.plazaearth.com/usr/gasperi/lego.htm .
Hi Micheal
I intend to have a crack at building your sensor. At the bottom of the page it
says
"If you use the color sensor to sort bricks, you need to calibrate the hue
reading for the bricks you want to sort with a controlled light source."
Could you elaborate on "with a controlled light source".
I'm wondering what a "controlled light source" is, presumably it's a light
source whose performace conforms to a certain specification. I'm also wondering
how to mount it, respectively to both the sensor and the brick, for optimium
performance.
Thanks
Steve
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In lugnet.robotics, Steve Lane wrote:
> Could you elaborate on "with a controlled light source".
The spectrum of the light reflecting off something is a function of the original
light spectrum and the color of the object. You need to control the light
because different light sources have their own color spectrum. For example if
you calibrated the sorter with sunlight it might not work very well under
incandescent light. I used a portable fluorescent light for my experiments. It
seemed to give the most stable spectrum and wasn't dominated by infrared like an
incandenscent light.
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