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 | | Re: Infrared Detector
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| (...) The most common metal can IR detectors are made by Sharp. The older ones I have are marked GP1U5X2 (with pins coming out the back of the can), but the newer ones I have are part number GP1U58Y (and have pins coming out of the bottom of the (...) (26 years ago, 25-Aug-98, to lugnet.robotics.handyboard)
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| | Re: Trying to understand
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| (...) Hmm. That sounds familiar. Had a 50's sound, recommended against playing with that dweeb, Bruno. It rings a bell, but I can't remember for sure. I'd be willing to bet the song was pro-tolerance. (...) Oops, my bad. I assumed Disney snarfed (...) (25 years ago, 16-Mar-00, to lugnet.off-topic.debate)
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| | Re: More LDRAW renderings
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| GeoMan skrev i meddelandet ... (...) You can see my water at (URL) for POVRay version 3.0 - might need '#version 3.0' to silence some error messages in 3.1, I haven't tested...) It consists of two parts - first a plane with ripples: -8<---...--- (...) (25 years ago, 2-Apr-00, to lugnet.cad.ray)
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| | OT: some fun
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| One night when his charge was pretty high, Micro-Farad decided to seek out a cute little coil to let him discharge. He picked up Milli-Amp and took her for a ride on his Megacycle. They rode across the Wheatstone bridge, around the sine waves, and (...) (23 years ago, 26-Apr-01, to lugnet.robotics)
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| | infrared / radio repeater
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| We now have an infrared / radio repeater system. It can do PC <--> RCX or RCX <--> RCX. (No networking yet!) The system translates the IR data to RF data and vice versa. Data may pass distances from 20m to 500m, depending on the selected RF-power. (...) (20 years ago, 5-Nov-04, to lugnet.robotics)
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| | In support of Larry
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| I'm ashamed of all the Larry-bashing that's been taking place. If you've only interacted with the man online (which I believe is the case with some of his harshest critics), you have no perspective on who he really is. Hence, you're really not (...) (20 years ago, 4-Mar-05, to lugnet.admin.general, lugnet.people) !
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| | RE: Ultrasound Range-Finding
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| (...) The IR sensors on the robot I built have an effective range of about 4 feet. The "downside" of IR sensors are that they are much more difficult to scale in terms of distance. I used a PIC chip to do both illumination and error elimination and (...) (28 years ago, 15-Apr-96, to lugnet.robotics.handyboard)
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| | Re: A RCX 'Beacon'
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| (...) Brian, I share your dream. It's a great idea. Surprisingly enough just this morning I wrote an email to Al Thiele asking for the same thing. I'm obsessed by the problem of knowing the robot position. I had some success experimenting odometry, (...) (25 years ago, 29-Jul-99, to lugnet.robotics)
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| | Ultrasonic sensors - comparison & performance?
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| I've been looking at ultrasonic sensors for the RCX - two seem currently availible, the 24 kHz one from Mindsensors, and the 40 kHz one from HiTechnic. What experience do people have with these, specificly? I suspect they wouldn't interfere with (...) (21 years ago, 18-Mar-04, to lugnet.robotics)
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(score: 1.981)
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| | Re: Motors comparison page updated
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| (...) Good thing, the load is not inductive. (...) OK, with a 1 second cycle time, and pure on/off, it is simpler. All you need is a solid state relay. (...) Looks like some people do: (URL) and worse, most of these dimmers work by dissipating and (...) (14 years ago, 13-Jan-11, to lugnet.robotics, lugnet.org.us.smart)
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| | Decoding Infrared receiver
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| Dear Mr Fred Martin/Friends, I have been playing with the handyboard for a while now, currently I have four handyboards. I'm working on the communication module between the handyboards using the infrared emitter and the Sharp IS1U60 infrared (...) (26 years ago, 2-Feb-99, to lugnet.robotics.handyboard)
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| | Re: LM34 temp sensor to handy board?
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| It sounds like you just want a standard non-inverting amplifier. wire an op amp like this: |\ sensor------|+\ | >-+-analog input of 6811 +--|-/ | | |/ | +----R1-+ | R 2 | GND where R1 and R2 are chosen such that (R1+R2)/R2 is the gain you want, in (...) (27 years ago, 21-Jul-97, to lugnet.robotics.handyboard)
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(score: 1.981)
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| | Re: Relativity Question
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| (...) observer (...) Acceleration is bad ju-ju, since it isn't accounted for in special relativity. It's only in General Relativity that we get gravity thrown into the mix, and that's taught in grad school. However, from a strictly special (...) (24 years ago, 8-Nov-00, to lugnet.off-topic.geek)
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| | Re: Mindstorms in 1999
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| (...) I disagree. Internationalizing PC software is way easier than internationalizing embedded software with its inherent space constraints. To provide Suaheli software for RCX control is just to include another string table and set of (...) (26 years ago, 11-Feb-99, to lugnet.robotics)
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| | Re: More powerful motor (was: stuff)
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| You need to be careful if you use more powerfull motors with lego construction. The plastic parts are very strong but you can easyly break teeth off of the gears or twist the rods with the current motors and a little bit of gearing. On the other (...) (25 years ago, 15-Oct-99, to lugnet.robotics)
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| | Re: Rolling ball clock revisited
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| (...) I love it! Very nicely done! It was interesting to read this bit off your website-- " The problem should have been very simple: each minute, start the elevator until a ball is detected by one sensor. Unfortunately, my first try over a several (...) (20 years ago, 7-Dec-04, to lugnet.technic, lugnet.robotics, FTX)
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| | Re: Lego RC set 8369
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| (...) Anyway i have some questions about this model as well. Figured it's better to use an existing thread rather then start another one. Well here goes: 1. Is the tranmitter also waterproof? I've tried going out just after it rained just so a trail (...) (20 years ago, 1-Feb-05, to lugnet.technic)
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| | Re: IR Tower range
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| (...) Tim, I haven't done any precise experiment about the effective range. In my experience, the actual range depends on many factors: - the orientation of both the IR tower and the RCX - reflecting surfaces in your room - interferences I'd say in (...) (25 years ago, 25-May-99, to lugnet.robotics)
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