RCX programmable brick : 2677


Robotics / RCX / 2677	2676 \| 2678

Subject:	Re: lego light sensor's capability of distinguishing colors
Newsgroups:	lugnet.robotics.rcx, lugnet.robotics.rcx.robolab
Date:	Tue, 28 Jun 2005 11:50:18 GMT
Viewed:	8091 times

In lugnet.robotics.rcx, Ross Crawford wrote: > The downside is a 3-colour scanner would either use 3 light > sensors (and 3 inputs), or a lot of complicated logic to get > 1 sensor to read all 3 colours. How about one sensor with a color wheel the RCX can drive (this is how just about all NASA spacecraft take those beautiful pictures)? Another option that might work (read: I've not tested this at all) is using more than one color of light to illuminate the surface the light sensor is reading: take one reading with no additional lightsource, then one with a bright green light illuminating the surface, etc. -- Brian Davis

Message has 1 Reply:

		Re: lego light sensor's capability of distinguishing colors
On Tue, June 28, 2005 6:50 am, Brian Davis said: (...) That sounds like a really smart idea. At least, that's what I thought when Philo did it: (URL) he just said... (URL) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

Message is in Reply To:

		Re: lego light sensor's capability of distinguishing colors
(...) My guess is you would have to use colour filters to get reasonable results. I did toy with that idea for doing a colour photocopier once, but haven't got around to actually testing it yet. The downside is a 3-colour scanner would either use 3 (...) (19 years ago, 27-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

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