Recent content by Packocrayons

Update : turns out I had cosine and sine reversed so my components were in the wrong direction, I got an acceleration of 0.57 m/s/s which is much more reasonable.

Homework Statement There are three boxes, box B weighs 2.0kg, and is sitting on a flat surface. To the left is box A, tied to box B. Box A weighs 8.0kg and is sitting on an incline 110 degrees from the horizontal (or 70 depending on the location of the measurement). To the right of box B is...

I have no experience with use of reuben's tubes but 'm in the process of building a 24" er with 20" of 1/16" holes, 1" at centers. 1/2" seems a little close to me.

Okay, so back to the original question that started this whole thing. Reading real life current values off of motors, they don't follow ohm's law, they draw much less current than they should for the resistance they have. the original answer was that the counter EMF reduced the effective...

Sorry, terminology wise I come from the model boat world where it's all just squished together and we all understand somehow. I do mean the counter EMF. If you put a voltmeter across the terminals of a brushed dc motor, you would not have the same potential difference that you have from the...

I was talking to my physics teacher today about electric motors and used some information I learned here. I'm not calling you guys wrong by any means, I just would like to know what is real. He claimed two things: 1. As load on an electric motor goes up, current goes down (I know this is wrong...

Page 8, no current will pass through the inductor? Why is that? If it's a DC source the current isn't changing.

Alright, I think I've almost got it. Thanks for the help guys.

Here's a good example, actually what made me this thread: http://www.datasheetdir.com/Schematic-For-The-Lm2596adpbckgevb-Lm2596-3a-Buck-Demo-Board+Application-Notes What would be the difference if the inductor wasn't in this circuit? Does it just smooth out the ripple current from the switching...

I'll try to find it again when I get on my computer. From what I remember it didn't say anything about their use, just the parts and how it was assembled. It said 'an inductor generates a magnetic field when current passes through it', I don't see what use that has in the way I see them put into...

After (partially) completing my goal of understanding capacitors, I'm onto inductors, even after reading the wiki article and doing a little more research, they make no sense to me. Currently what I'm thinking is that they are the "opposite" of capacitors, allowing DC to pass through but...

That is much simpler than I made it, thanks.

So if you generated the back-emf voltage, and subtracted it from the supply voltage, you would be able to find the actual current flow? What's the easiest way to calculate that voltage?

I see no reason why not, the wave effect might be diminished slightly or you might get some distortion from the waves bouncing a little bit, but nothing that should make the final waveform difficult to see. I'm going to do it with a 2" ID pipe at some point, so I'll see how it works if I ever...

According to classical physics, if I take an electric motor with a resistance of 1 ohm, and run 10 volts through it, 10 amps of current will run through it. But through experiment, a lot less current will run through the motor, an average brushless motor with a resistance of less than a milliohm...