Forum: Technical Discussion
10-01-2007, 11:28
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Replies: 15
Views: 2,025
Re: Arms anyone?
If past FIRST robots are any guide, we're going to see a few robots with arms that absolutely do not work. The majority of robots with arms will work but not particularly well. There will be a...
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Forum: Car Nack's Corner
09-01-2007, 11:42
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Replies: 47
Views: 9,950
Re: Car Nack Predicts 01/08/07
While I agree that scoring of keepers will be rare, I don't think it will be as rare as scoring a vision tetra was in 2005. To me, the autonomous problem this year seems an order of magnitude...
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Forum: Career
30-11-2005, 21:20
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Replies: 45
Views: 8,807
Re: How did you GET your job(s)?
In many ways suprising to myself, I've never gotten a job through FIRST (although it almost got me an interview one time; Delphi never got around to calling me back after they said they wanted to...
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Forum: General Forum
30-11-2005, 21:14
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Replies: 10
Views: 1,958
Re: 2006 FIRST Robotics Conference
I've done prescreening (aka looking at resumes and determining who gets to talk to the actual recruiters) for Boeing a number of times at the career fair. We do look at GPA but in a very general...
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Forum: General Forum
28-11-2005, 22:57
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Replies: 15
Views: 2,518
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Forum: General Forum
12-11-2005, 11:54
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Replies: 4
Views: 1,318
Re: FIRST 101 (11/11/05)
I want to say that was 2002 or 2003. I can't quite remember which.
The favorite I've heard of (it apparently predates me by a year) was a NASA team asking in 1997:
Can our rotor downwash knock...
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Forum: Math and Science
11-11-2005, 14:59
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Replies: 13
Views: 15,641
Re: Water balloon ballista
Trebuchets really aren't that complicated. I built a computer-targetted one for my senior project. They're simpler in that they don't use tension; they use a counterweight instead. The only real...
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Forum: Programming
11-11-2005, 11:44
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Replies: 16
Views: 3,687
Re: Nintendo Style Speed Booster
You're right about the PWM control although I'd say the H-bridge is also an analog device but that's beside the point. I really need to think through before I post.
While peak-voltage is still the...
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Forum: Programming
11-11-2005, 10:49
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Replies: 16
Views: 3,687
Re: Nintendo Style Speed Booster
This is wrong but I don't think I should delete it, just didn't want anyone to pay attention to it:
No they're not. To control the speed of a DC motor, you vary the voltage applied to it. PWM is...
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Forum: General Forum
10-11-2005, 21:51
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Replies: 4
Views: 1,324
Double-Elimination Ladder
There was a post requesting an image of the old double elmination ladder that FIRST used to use (back when it was 1v1v1). A hand filled in copy of the 1998 ladder was duly provided. In looking...
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Forum: Math and Science
10-11-2005, 18:30
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Replies: 2
Views: 1,001
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Forum: Control System
08-11-2005, 09:42
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Replies: 17
Views: 1,738
Re: Strange Behavior
That may be indicitative of a cold solder joint. When warm, the joint expands and everything work fines. When cold, the joint contracts and no contact is made.
I experienced this first hand back...
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Forum: General Forum
04-11-2005, 22:57
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Replies: 215
Views: 17,578
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Forum: Motors
31-10-2005, 21:22
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Replies: 27
Views: 7,027
Re: Motor Bias
Did you at all check the calibration of the Victor? You could put a voltmeter on the output of the Victor and measure the voltage. It should be the same in both directions (well, one should be the...
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Forum: Programming
31-10-2005, 16:02
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Replies: 20
Views: 1,438
Re: Coders' Wishlists for 2006
I had some similiar code last year but it got lost in a laptop crash. There's also a pretty good atan2 approximation (or at least it seemed to be) out there if you'd want to include that too. This...
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Forum: Rumor Mill
31-10-2005, 15:50
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Replies: 394
Views: 140,197
Re: 2006 game hints?
I've also heard mentioned that there was a trial competition where they tried out the premise of FIRST. That's about the end of my knowledge of it however.
Matt
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Forum: Chit-Chat
31-10-2005, 00:24
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Replies: 46
Views: 11,455
Re: True things heard at college.
Fishes is a word. (See here under plural: http://www.m-w.com/dictionary/fish ). It does generally refer to multiple types of fish however.
Matt
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Forum: Electrical
31-10-2005, 00:22
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Replies: 33
Views: 8,489
Re: manual control of a victor?
For my senior project this past quarter, we controlled Victors with a Motorola 68HC12. It worked quite well overall. Just remember you only need to connect the signal and ground wires (not...
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Forum: Programming
31-10-2005, 00:20
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Replies: 20
Views: 1,438
Re: Coders' Wishlists for 2006
Maybe there can be an implementation of a fixed-point set of basic trig functions that can be used. I know there are fixed-point approximations for some trig fucntions that work fairly well and...
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Forum: Extra Discussion
25-10-2005, 22:47
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Replies: 7
Views: 1,890
Re: pic: huge tree uprooted
The trees probably already too far gone. In general, disturbing the roots of a large tree in any way will kill it. Particularly for trees (like this one) that have a shallow root system.
Matt
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Forum: Chit-Chat
25-10-2005, 21:28
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Replies: 90
Views: 14,347
Re: Facebook
I was finally convinced to signup a little bit ago, so I suppose I'll put my link in here ('cause, you know, I'm so wildely popular):
http://rit.facebook.com/profile.php?id=24410854
Matt
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Forum: Chit-Chat
25-10-2005, 21:17
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Replies: 97
Views: 5,446
Re: Funny things teachers/professors have said
I have a professor who likes to refer to sleeping during class as "doing z-transforms."
I have many more funny comments locked in my brain somewhere but I can't come up with any of them right...
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Forum: Technical Discussion
25-10-2005, 21:13
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Replies: 6
Views: 899
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Forum: General Forum
21-10-2005, 08:59
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Replies: 53
Views: 8,812
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Forum: Electrical
21-10-2005, 08:44
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Replies: 20
Views: 4,555
Re: Victor 884 won't go forward
I also second the statement about the fact that Victors seem to be extremely reliable. I've been working with them since they existed and haven't seen too many fail. I should say that there's a...
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