Archive for the ‘line follower’ Category

How do you draw the line between religion and superstition?

Wednesday, July 14th, 2010

Often there are followers in a religion (eg. one sect) who see some kind of miracle or magic, then other followers within the same religion (another sect) say it’s just superstition and not religious. They might all use the exact same book to say why they’re right.

How and where do you draw the line?

I don’t draw the line. The line is drawn by each person. There is no universal truth that we can access. Everyone has their own ideas and models that they believe work for them in their life.

Line Following Contest

Sunday, July 11th, 2010

Eugene recently had a line-following contest at the annual asian celebration. Unfortunately, several of the would-be entries got locked up in the local high-school, so we only had 3 contestants. Myself, one of my kids from the robotics club I mentor, and cute little snail bot that is all analog.

I spent all week working on my PID algorithm, and almost gave up the day before. But it turns out the test mat I built at home was far more difficult than the mat at the contest. So I’m glad I actually went.

I only planned to enter the “beginner” contest, but since there were so few contestants, I went ahead and tried my bot on the “advanced” course. Turns out that they’ve never had a bot successfully complete the advanced course, which my bot did on it’s 2nd try (which didn’t get recorded).

Duration : 0:5:41

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questioning if christianity is correct in its time line?

Sunday, July 11th, 2010

to put it basically, if i remember my bible studies correctly, there has always been followers of god since the beginning, adam and eve, but according to our known history, judaism did not arise till well after Babylon and ancient Samaria had already come and gone, how can this be?

I’m not certain what you mean by "come and gone" but both Babylon and Samaria were continuously occupied well past the rise of Judaism. Babylon until at least the 7th century AD, and Samaria up to this very day.

How do I find a book that I only know the story line, no title or author, from early 80’s?

Thursday, July 8th, 2010

It’s a mature content of a woman gets kidnapped and taken to a different "time" and is made to pretend to be the queen. Fantasy realm, slavery, as best I can remember it was quite explicit. The woman is a pawn in politics and suppose to take the fall for the real queen who is being hidden by her loyal followers. woman is sold into slavery and thru political twists and intricate turns the real queen is the one who gets hunted down and killed

Go to the book section on amazon or ebay and type in a few key words. YOu should be able to find it. I have found several books that way. You could also ask your local librarian.Also there are plenty of book club type websites where you can post questions about books you are looking for. Go to yahoo or google and just type in online book clubs or book message boards.

Line follower robot “GOOFY”

Tuesday, July 6th, 2010

Line follower robot based on ATMEGA8.

Duration : 0:1:28

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how to make a line follower with grabber.?

Monday, July 5th, 2010

to be more specific we need a program in C using PIC16F84A

I am happy to help but you will definitely need to be "more specific" by explaining precisely what you are asking because i have absolutely no clue what you need in "C".

how do u find ripple rejection ratio of a voltage follower regulator circuit?

Friday, July 2nd, 2010

if input and output voltages are given for the above circuit and max load current and hfe(min) are given too…….the how do we find
1. ripple rejection ratio
2. load regulation
3. line regulation

The circuit would be helpful. If this is a simple emitter follower with a reference applied to the base:

Ripple rejection depends on the slope of the collector curves, or change in HFE and leakage current with VCB. With what you are given, it would have to be measured.

Load regulation. At high load, calculate IB = IC/HFE. Is this base current enough to change the reference voltage? If not, check VBE versus current, it will have an effect. Probably easier to measure it.

Line regulation is the same as ripple regulation.

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Line Follower Robot

Friday, July 2nd, 2010

The robot name is GAJAH UNNES. Gajah from Indonesia.
AT tiny 2313, LM339, H-Bridge transistor motor. Using Fuzzy logic, 8 photo diode as sensor

Duration : 0:0:57

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How do I find a book that I don’t know the author or title, just the story line?

Wednesday, June 30th, 2010

I read it in the early 80’s. A woman gets kidnapped and taken to a different "time". She is made to pretend that she is the queen as the real one has been hidden by her loyal followers. She gets sold into slavery and thru twists and turns by both political groups the real queen is the one hunted down and killed. It’s Fantasy and as far as I can remember, quite explicit.

You don’t. I’ve tried (have been trying) to find a book for over six and a half years now. It’s not an obsession, I rarely think about it, but when I do it pisses me off. Have fun, and good luck.
Try Medieval political intrigue.

Very Fast VEX PID Line Following Robot

Monday, June 28th, 2010

VEX line following robot as published in ROBOT magazine Sept/Oc 2009. Very fast — compare with other video showing classical “zigzag” algorithm. About two feet per second. Uses a PID control algorithm and line following sensor from Pololu.

Written in ROBOTC. Speed limited by latency in the VEX motors.

Complete source code available in the sample programs shipped with ROBOTC (version 1.58 an above). See www.robotc.net. for download.

Duration : 0:0:13

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