Sunday, January 23, 2011

Week TechVideo, 2011 #03 - Light FX

RoboticSolutions, the authors of CubeStormer, have uploaded a new video featuring the "LEGO PF 3D Light Show".

Built with LEGO Power Functions elements, it is a 3 axis rotation device which can produce some stunning lighting effects.
The six IR channel remote allows for independent control of each axis and the RGB set of LEDs.

When I first saw it, thought that the NXT Color Sensor might have been used to produce the light effects. However immediately after, I realized it was not the case, but some discrete electronic LEDs were used instead.
It is a construction entirely PF based, thus not having any kind of MINDSTORMS control.


Anonymous said...

Is really amazing How the build this incredible model, I have a lot of Question, but this is Awesome demonstration of PF can DO!!!

Ricardo Oliveira said...

The idea is brilliant. A lot of people will find this amazing from interaction design perspective.

But, actually, an NXT with the same 3 motors and 3 color sensors to fit the LED purpose instead, together with random movements, or not so random, would be perfect!

Another advantage is that the color sensor has a stronger LED, I guess.

TechnicBRICKs said...

@Ricardo Oliveira

However I guess if made with NXT elements, intelligent brick, etc...
due to the elements weight and form, the balance (inertia) would become a much bigger challenge to deal with.

In order to achieve infinite rotation you would need to use two NXTs, because of the cables connecting to the motors.

I'm almost sure, the model we have ssen on the video also uses two battery boxes. One in the base, another in the gyro.

Ricardo Oliveira said...

You're right Conchas, I forgot the wire connections. :-)

Than, yes, I agree it has to have 2 battery boxes and the NXT would be hard to use.

Well, we can keep the structure and use an external NXT and IRLink sensor together with the remote controls to make some automatic random movements.

In any case, I wonder if it would be possible/simple to power a color sensor, just for the LED impression, directly to the PF output...

Ricardo Oliveira said...

*The NXT version wouldn't be witht he remote controllers of course. I said it wrong. The IRLink would replace them. ;)

TechnicBRICKs said...

The IRLink usage is a relly good idea, to address those issues above mentioned.

Just wonder if the IR reception would function properly, while at high spinning speeds, but likely it would.
Only experimental tests would prove if we are right.

Anonymous said...

I played with PF lights and motor a month ago, but the results werent as spectacular. Awesome, really great!

TechnicBRICKs said...

From the video description I was lead to think that Mike Dobson (guess it was Mike) have use discrete colored LEDs.

Suddenly it came to my mind that PF Lights with RGB colored light bulb covers may also be used, making it more straightforward to build.

Mike said...

The LEDs in the video are actually the white PF ones (2 per colour) with a coloured light filter brick on the end.
(This is an ALL lego construction)
BTW: the NXT & IR link sensor DOES work at high speed,what is really cool is using a Sound sensor the NXT can flash the lights to the beat of the music AND sequence the rotations as well:)

TechnicBRICKs said...


Great idea! The usage of the sound sensor. :)
Looking forward to see it! But I guess you already got to work... :)

Menno Gorter said...

What about Bleutooth? ;-)

However, I think it's better to use the NXT as the base and PF-receivers in the mechanism, if you want to use a NXT.
And it would be no problem to use every sensor or phone.
So let it react on sound, light, movement and whatever! :-)

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