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 | | Re: Discussion of Train Table Sizes
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| In lugnet.trains.org, Philippe Label wrote: (snip) A quick note... If you go with 30 inches EXACTLY, your tables will be just a smidgeon too small to hold a 4x4 baseplate since they are not exactly 15 inches but rather just a little over. We went (...) (20 years ago, 12-Dec-04, to lugnet.trains.org, FTX)
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measurement
(score: 1.988)
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| | Timing of RCX statements
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| I was trying to simulate a serial link by using an output of the RCX. I didn't work and when I analyzed the timing, I found out that the RCX's execution of statements is far too slow for the protocol I wanted to simulate. So I made some measurements (...) (24 years ago, 23-Oct-00, to lugnet.robotics.rcx.nqc)
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measurement
(score: 1.988)
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| | Re: MOC: Spirit of St. Louis
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| (...) It is a device used on an aircraft to measure airspeed. If you know the static pressure you are in, and you also know the apparent pressure that you are experiencing in the direction of travel, ("ram air") the difference can be used to (...) (21 years ago, 1-Feb-04, to lugnet.adventurers, FTX)
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measurement
(score: 1.988)
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| | Re: Inductive sensor?
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| (...) There is always a way. You would need a very high gain amplifier to pick up the small amount of voltage induced into the "wrapped" wire. If you are talking about LEGO motor wires, you would need to separate the pair of wires and only wrap (...) (20 years ago, 15-Feb-05, to lugnet.robotics)
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measurement
(score: 1.988)
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| | Re: Lego Scale Conversion Tool
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| (...) Assuming a 50/50 gender distribution, that's 5'-6.4"... but according to stats... [goes and checks stats] US population is predominantly female (slightly): 48.90% male 51.10% female (1). Accounting for that, we get average height at slightly (...) (23 years ago, 13-Mar-02, to lugnet.general)
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measurement
(score: 1.988)
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measurement
(score: 1.988)
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| | Re: Balancing robots
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| Hello PeterBalch, Tuesday, January 20, 2004, 9:19:20 PM, you wrote: P> How does a balancing robot like Legway balance on a patterned floor? Or can P> it? P> I've got some of the way there. P> My understanding from reading the web descriptions of (...) (21 years ago, 20-Jan-04, to lugnet.robotics)
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measurement
(score: 1.988)
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| | RE: Low battery detection
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| (...) ===...=== (...) divider (...) about (...) point. (...) input (...) bat (...) ===...=== (...) ===...=== Hi Jaron, I took the PCB off the battery case, and connected a wire to the +ve terminal of the battery pack. Then I connected two resistors (...) (27 years ago, 25-Mar-98, to lugnet.robotics.handyboard)
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measurement
(score: 1.988)
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| | Re: RCX sensor interfaces - diodes
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| I think the real point here is that it is usually necessary to incorporate a bridge network of six diodes to interface to the RCX sensor inputs. The signalling current must pass through at least two series diodes to get to the RCX terminals - a (...) (23 years ago, 28-Sep-01, to lugnet.robotics.rcx)
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measurement
(score: 1.988)
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| | Greenburg Train Show
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| Just to let you know I will be formalizing our form for inclusion in December 2-3 Greenburg show in Willmington. I am going to somewhat conservative it terms of size as this will be our first show but I really hope we will be able to pack the space (...) (24 years ago, 19-Sep-00, to lugnet.org.us.nelug)
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measurement
(score: 1.988)
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| | Re: measure motor torque with a light sensor
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| (...) Actually you are measuring the speed of the motor. For DC motors the current is linear with torque and the speed is linear with voltage. If you just hook the motor to the input, you made a tachometer. It will only work in one rotation (...) (26 years ago, 29-Jan-99, to lugnet.robotics)
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measurement
(score: 1.988)
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| | Re: Conversion between LDU, inches and millimeters
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| (...) 25.4 (...) Yes. Here is a table provided by Lycos: (URL) down and notice that the value for inch->millimeter is given as "25.4000" The story I heard is that, at some point around 100 years ago it was decided to redefine the English weights and (...) (25 years ago, 24-Aug-99, to lugnet.off-topic.geek)
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measurement
(score: 1.988)
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| | Re: Sword fighting robots
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| (...) I suppose you could use the IR transmitter and light sensor as a rangefinder. Quite a few people have succeeded in getting range measurements using that scheme. If the target is a known colour, that'll make it easier. If the two robots take it (...) (22 years ago, 21-Aug-02, to lugnet.robotics)
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measurement
(score: 1.988)
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| | Re: Autonomous Robot
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| (...) You can work it out easily enough - if you know the height of the tower and the angle of the laser to the ground. For (say) a 1 meter tall tower, the error (in meters) is 1 / tan ( A ) - 1 / tan ( A + 1 ) ...so if the beam is at 45 degrees to (...) (24 years ago, 10-Aug-00, to lugnet.robotics)
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measurement
(score: 1.988)
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| | Can I make a circular plate with 30355s and 30356s?
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| Hi, I want to make a merry-go-round that will use the 14-stud UFO domes as a canopy. A calculation assuming that the edge of the wing tapers by an integral number of studs says that the angle is just a little over 18 degrees, which would mean that (...) (24 years ago, 31-Aug-00, to lugnet.build)
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measurement
(score: 1.988)
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| | Re: Wheels with/without metal axle
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| (...) Not a big deal. As long as we're communicating, it's OK. :) (...) Please don't do that. If there are problems in files, then let's correct the errors (or come to agreement that they aren't actually errors). (...) Uh, what is x573? Is it used (...) (20 years ago, 29-Sep-04, to lugnet.cad.dat.parts)
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measurement
(score: 1.988)
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measurement
(score: 1.988)
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| | Re: Modeling without the real element -- bad
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| (...) What if they slip past Terry, not being noted as "mockups" and it takes someone a long time to notices that they're incorrect? (...) Does that imply that carelessness and LDRAW do mix? (...) Precision/decimal accuracy are one thing -- that's (...) (26 years ago, 26-Feb-99, to lugnet.cad.dev)
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measurement
(score: 1.988)
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| | Re: Displacement Tonnage for Spaceships?
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| (...) Don't worry, building large ships is actually easier than it might seem. I was building mere 100 studish long ships for years, then I decided to make the jump to large ships. I now have built a 240 or stud long ship which weighs upward of 25 (...) (22 years ago, 31-Dec-02, to lugnet.space)
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measurement
(score: 1.988)
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| | Measuring robot turn angle
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| The drive system in my robot is an adder-subtractor (see (URL) which uses two differentials in order to get equalized forward/reverse drive while allowing turning and pivoting (turning in place). For navigational purposes, the robot should be able (...) (23 years ago, 9-Jan-02, to lugnet.robotics.rcx.legos)
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measurement
(score: 1.988)
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