Recent content by Jcouls29

I think I may have come to the conclusion that a closed form solution isn't analytically possible based on the definition of a sine wave. I appreciate the suggestions. I may have to determine a solution through trial error and determine from there what to do. If anyone in the future can help...

Cool, I'll check it out. Thanks I didn't realize what you were saying before Phil.

Thanks for the response Phil, I did try this but the derivative still has 2 terms based on the chain rule which unfortunately, doesn't help unless I can constrict the function. I'm trying to use the taylor series dynamically to try and obtain an answer. If I set more restrictions on the f2...

I understand what you're saying. I'm at the point where a general solution isn't available (actually I kind of knew that when I posted this). But I'm not quite sure what you mean with t = Nq pi / w1. Actually more times than not, w1/w2 will be rational since pi generally cancels out then you...

Thanks, I looked into doing something very similar to this. Of course, cos(wt+b) != cos(w1t) + cos(w2t) but I wanted to get a frequency of peaks (which is w2 if larger than w1) but the real issue arose with the trigonometric function to get rid of the addition of cosines. Anyways, I'll...

To be honest, I don't really know what you're trying to do exactly but when it comes to curl, it's usually best to try and perform the "curl" of the vector (del x Vector). It's a principle in wave theory but gives you the "amount" of rotation at a point. If you try and minimize the curl...

I'm trying to get a method to determine the time, t, when two sine waves added together peak, an exact solution. For instance, F(t) = sin(w1*t) + sin(w2*t) Obviously this is not really mathematically straightforward because there are infinitely many solution based on the nature of the sine...

Well this is no simple task. There are a few topics you'll need to learn (at the very least) 1) Mouse and Keyboard protocols (through USB) 2) RF Knowledge which will include circuit antenna design, network matching, modulation and demodulation techniques. (Let me say that this is only...

We kind of talked about this in this thread. Look for my post and you'll see a video link to a light tracker I made. It consists of 5 photoresistors (LDRs) that keep up with where the light it. https://www.physicsforums.com/showthread.php?t=223686 ------------- Justin Coulston...

Voltage, Current, and Resistance are interrelated. Simply to answer your question, you can't have voltage without current, nor current without voltage based on Ohm's law. Each one must have each other in some way or another. Now I'm going to explain it V=IR is a well known equation for EEs...

The only way I've ever seen complex numbers in matrix form was like so: [real -imag] [imag real ] So it's a two by two matrix, so if you input the impedance, and current into these equations and do the DOT-PRODUCT, you'll get the voltage in matrix form. I don't think you can easily do it...

Wow, yea...I can't beat that. Mine was a simple 'ole LDR tracker...*sad* Cool vid! ---------- Justin Coulston justin.coulston@gmail.com TheModernEngineer.blogspot.com

That's not necessarily true. 1) Most inverters you don't have to use to their full potential for them to work. If I had only 10 amps of 12V panel then the inverter would convert only 10 amps. Now when the load has a greater need than that...well... 2) It really wouldn't be smart to hook...

The best way to measure radiation is to use a pyranometer. Most don't need any external components or power sources. I had to purchase one for a job a while back. They're fairly accurate but you would have to have a way to read uV, or amplify this. Anyways, that's probably out of the price...

Hook some Solar Panels up to it. 12V Panels aren't hard to find and it's free energy you can use for a bunch of things. That's what I would do with it, but that's me. I would even maybe puts some batteries in between to have a backup power supply for a coffee maker or something...anyways...