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Subject:	lego light sensor's capability of distinguishing colors
Newsgroups:	lugnet.robotics.rcx, lugnet.robotics.rcx.robolab
Date:	Mon, 27 Jun 2005 19:07:53 GMT
Viewed:	5960 times

Hi Just wonder if there is anyone who has attempted to have lego light sensor to distinguish more colors than just black & white. Blue is too close to black... white is too close to white... ---------------------------------------------------------------------------- -------- Elizabeth Mabrey -- MIME ATTACHMENTS DISCARDED: 1. Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Length: 1352

Message has 4 Replies:

		Re: lego light sensor's capability of distinguishing colors
On Mon, June 27, 2005 2:07 pm, Elizabeth Mabrey said: (...) I built an M&M sorter that used a LEGO light sensor... (URL) worked out pretty well, because I could just dispose of any evidence of mis-sorting. As far as real results, I think it sorted (...) (19 years ago, 27-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

		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)

		Re: lego light sensor's capability of distinguishing colors
(...) Alone - it is not very good. I have seen a custom sensor with three light sensitive elements and filters. you might be able to build a crude one with one light sensor, one motor(slowed down with worm gear or the micromotor), a wedge belt (...) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

		Re: lego light sensor's capability of distinguishing colors
(...) The problem is that LEGO light sensor is basically color blind, all you get is different reflectivity levels. Take care of dark shiny surfaces that can reflect as much as lighter ones (try to place the sensor at an angle to avoid direct (...) (19 years ago, 28-Jun-05, to lugnet.robotics.rcx, lugnet.robotics.rcx.robolab)

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