Robotics : 14795


Robotics / 14795	14794 \| 14796

Subject:	Re: Shutting off illumination LED on Light Sensor for LIDAR
Newsgroups:	lugnet.robotics
Date:	Thu, 29 Mar 2001 17:08:53 GMT
Original-From:	Chris 'Xenon' Hanson <xenon@3!stopspammers!dnature.com>
Reply-To:	xenon@3^NoMoreSpam^dnature.com
Viewed:	876 times

Troy McLucas wrote: > I drilled a hole in a 1x2 brick to give the light sensor a better sense of > direction and to block the LED. The goal was to have the light sensor seek an > IR beacon. > http://www.personal.psu.edu/tam209/lego/light_shroud/light_shroud.html > -Troy Thanks for all the tips, everybody. I set out last night to open up my light sensor and add a jumper to allow me to take the LED out of the circuit. I was unsuccessful in getting the casing open, even after cutting the underside latching tabs away completely. I saw someone mentioned that there's a bit of glue on the inside holding it together. Have tips on cracking this baby open without destroying it? Someone else mentioned that LegOS is able to read the light sensor 'passively' without illuminating the LED. Any LegOS folks here know what they do differently? I keep seeing references to Gasperi's web page as having a schematic of the lego Light Sensor, which would be helpful, but I haven't found it on his site yet (too much great stuff to dig through). If anyone has a direct URL to the sensor schematic, I'd appreciate it. Thanks again everyone. Chris - Xenon -- Chris Hanson | Xenon@3DNature.com | I've got friends in low latitudes! New WCS 5 Demo Version! http://www.3DNature.com/demo/ "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen

Message has 2 Replies:

		Re: Shutting off illumination LED on Light Sensor for LIDAR
(...) That's not a legOS feature. You just set the input port to passive mode, and read it in RAW mode. There is an example in NQC at (URL) (I forgot to add the address in my previous post :-). (...) You can find light sensor schematics on Michael (...) (24 years ago, 29-Mar-01, to lugnet.robotics)

		Re: Shutting off illumination LED on Light Sensor for LIDAR
(...) I strongly suspect this is a myth. A transistor is a transistor is a transistor. They all require biasing in order to function properly and that requires power. Mind you, even so-called passive devices must either generate a voltage or have a (...) (23 years ago, 31-Mar-01, to lugnet.robotics)

Message is in Reply To:

		Re: Shutting off illumination LED on Light Sensor for LIDAR
I drilled a hole in a 1x2 brick to give the light sensor a better sense of direction and to block the LED. The goal was to have the light sensor seek an IR beacon. (...) (24 years ago, 29-Mar-01, to lugnet.robotics)

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