Subject:
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Re: LEGO light sensor schematic
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 30 Apr 1999 14:57:30 GMT
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Viewed:
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945 times
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In lugnet.robotics, Michael Gasperi writes:
> Anybody cut one of these rotation sensors open yet? A guy in Japan
> (Sasuraibito) has discovered what he thinks is the circuit for the LEGO light
> sensor. He also gave me permission to publish the image and circuit on my
> page.
> http://www.plazaearth.com/usr/gasperi/lego.htm
Hmmm. Not to be overly critical, but that circuit wouldn't do a darn
thing. We have an OpAmp connected to nothing that is set to oscillate for
no reason, diode pairs that won't supply power to the circuit, an optical
sensor that is biased backwards and lots of transistors set to act as diodes.
I think he needs more work on the sleuthing, that can't be correct.
IMO,
DLC
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Message has 1 Reply:
 | | RE: LEGO light sensor schematic
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| (...) Hmmm, Michael is usually pretty careful about what he posts and he has just a little experience with this kind of thing :-). In fact, Michael's own powered sensors look a lot like this one. From left to right: The diode pairs that don't do (...) (25 years ago, 30-Apr-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Og Needs More Inputs (fwd)
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| (...) It is an optical (I think) incremental encoder where the 2 quadrature bits are converted to analog values. There is a pretty good description of the LEGO rotation sensor on my web page and also plans for a homebrew version that works about the (...) (25 years ago, 30-Apr-99, to lugnet.robotics)
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