Search found 309 matches
- Sun Oct 23, 2005 7:10 pm
- Forum: Robotics
- Topic: shaft encoder/absolute positioning
- Replies: 4
- Views: 6567
Re: shaft encoder/absolute positioning
The cheapest shaft encoder available is inside a serial mouse.Two for a buck in the dollar store. The encoding is well documented,just do a search. Industrial grade encoders cost three to five hundred dollars. The output is a square wave that needs to be processed. Ablolute positioning implies that ...
- Sun Oct 23, 2005 5:33 pm
- Forum: General Discussion
- Topic: Treshold of hearing...
- Replies: 9
- Views: 3740
Re: Treshold of hearing...
YOu could try a set of noise cancelling headphones.I've seen them for 30 bucks in Staples. If the sound is still there it's probably in your head.
- Thu Oct 20, 2005 8:04 pm
- Forum: General Discussion
- Topic: 12v on Pic input
- Replies: 24
- Views: 10752
Re: 12v on Pic input
use an opto isolator so that the chip only sees voltage from it's own supply.
- Fri Oct 14, 2005 6:08 pm
- Forum: General Discussion
- Topic: Turning Heads
- Replies: 14
- Views: 6152
Re: Turning Heads
How about a qyro?
- Mon Oct 03, 2005 10:52 am
- Forum: General Discussion
- Topic: Opinion
- Replies: 7
- Views: 3600
Re: Opinion
that's just his opinion
- Mon Sep 26, 2005 1:59 pm
- Forum: General Discussion
- Topic: Go stand in the corner, Chris
- Replies: 74
- Views: 34157
Re: Go stand in the corner, Chris
Since when did kenetic energy have anything to do with gravity? Sounds like sombody is just guessing!
- Tue Sep 20, 2005 3:16 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
The two pi is already in there. If you have a one foot radius the circumference is 2pi feet. A circle has 2 pi radians so one radian would equal one foot of circumference. It's exactly the same as the linear version. 550 pounds of force at one foot per second.
- Mon Sep 19, 2005 7:35 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
My professor was unable to speak the day we learned about touque.He was a little horse. When I asked him a question his brow went into a long furrow and he answered in foot pounds.
Now that's horsepower
Sorry just pulling your chain!
Now that's horsepower
Sorry just pulling your chain!
- Mon Sep 19, 2005 5:10 pm
- Forum: General Discussion
- Topic: Fuel level meter
- Replies: 15
- Views: 7146
Re: Fuel level meter
How about strain guages on the support straps to measure the weight of the fuel.
- Sun Sep 18, 2005 8:01 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
Foot pounds and pound feet can be confusing although they are clearly defined. I wouldn't use either one without adding the words "of energy" or "of torque" after them for reinforcement. I don't see how you get from a failure of the English language to "chaos" The real ...
- Sun Sep 18, 2005 7:01 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
So you are saying that they don't define the same amount of energy? How so?
- Sun Sep 18, 2005 6:28 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
"100 pounds and one foot are not the same as 100 feet and one pound, and thats why its called the Pound foot, after James Watt meant it to be."<p>They are the same in that both situations define the same quantity of energy.
- Sun Sep 18, 2005 5:49 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
"A inaccurate expression because you cant have 100 feet, and one pound of force, and call it a accurate term."<p>What makes this inaccurate? One pound of force acting over a given distance sounds precise and repeatable to me.
- Sun Sep 18, 2005 4:28 pm
- Forum: General Discussion
- Topic: where does the power go?
- Replies: 80
- Views: 36033
Re: where does the power go?
I don't usually like to get into these peeing contests but I can't resist. I work for an old company who’s turn of the century product was a pump that used the linear force from a steam cylinder to move a piston which in turn pumped fluid. So tell me was it pumping without horsepower or was it produ...
- Mon Sep 05, 2005 6:25 pm
- Forum: General Discussion
- Topic: pwm & dc motor control
- Replies: 16
- Views: 6770
Re: pwm & dc motor control
Logic zero outputs can often be around 1/3of the supply voltage. Your circuit may be on all the time. It could also tend to heat your transistor if it stays in a partially on state.