# mmalluck

Senior Members

216

1. ## Voltage Divider Circuit problem!!

I'm not sure why your voltage divider isn't working. Could it be that the load is dynamic? In other words it draws different amounts of current depending on what is operating. If this is the case it's impossible to use a simple voltage divider. You'll really do yourself some favors if you can seperate the control logic voltage supply from the dc stepper motor supply. All kinds of problematic noise can come back from that motor and eat-up your chips or make them do weird things. You'll probably hear the motor operating through you audio-amp as well. Best use some regulators to seperate them. When you say heat, I assume your saying your regulator is getting warmer that you would like. One way to fix this would be to put a small valued resistor in series with your regulator. It won't reduce the total amount of heat made, but it will share it between the resistor and regulator. Don't forget to use a correctly rated resistor (wattage-wise) to disapate that heat.

3. ## Schroedinger's cat

I think we left out a state... "In fact, the mere act of opening the box will determine the state of the cat, although in this case there were three determinate states the cat could be in: these being Alive, Dead, and Bloody Furious." -- Schrodinger's Moggy explained (Terry Pratchett, Lords and Ladies)
4. ## Schroedinger's cat

Unless, by some quark of quantum physics, your cat quantum-tunneled right out of the box, but you wouldn't know that until you opened or even lifted the box.

Not too much unless there's a method for testing this hypothesis, otherwise I fear it's about as useful as creationism, just an idea. You would need to be able to step outside of our time reference to see if comparitive time flowed differently. Not exactly an easy task. I'd like to somehow throw time dailation into the mix as a way to change our reference, but distance and travel are dependant on time, so that can not be a truely independant time reference.
6. ## what is and why are there harmonics?

Yeah Panics stuff is pretty good. Let me see if I can simplify things a bit. Harmonics are the result of boundary conditions; that several waveforms can exist in a given space. Lets looks at panic's second picture again. The shaded bits are wall, waveguide, post, or some other material a wave can reflect off of. The black line is your wave. These wallls are your boundary conditions. In order to establish a standing wave (or in other words, cause this chamber to resonate) the wave can only meet the wall where it crosses zero. If the wave falls in any other manner it will fail to resonate within this given space. It turns to garbage. So we start sticking waves into the cavity that meet this requirment. We find that multiples of the frequency fit nicely (.5 lamda, 1 lamda, 2 lamda......) This is true of all forms of resonance. What causes this in your radar stuff? I'd venture to say that the radar is not producing a perfect sin wave. There's a theory that any wave form can be made by summing together an infinate number of perfect sine waves. This means for any wave that is not a perfect sine wave, all frequencies are represented, though many will be at a very small power. In this case the resonating cavity of your radar system acts to filter out all the other frequencies (they turn to garbage), but the resonate ones, so they show up in your output.

Or is it that we can only experience time in positive motion? Lets say for an instance that the travel of time is not constant and not always forwards. If time were to suddenly start traveling backwards, there would be no way our physical being could observe it. We need the cause and effect correlation to form memories or make observations. Would we have any perceivable way to observe it's deviation? No, not as long as we are subject to it. It's an interesting idea.
8. ## Measuring Time

my ascii art was a little killed, but I think you get the idea.
9. ## Measuring Time

It has been theorized that even empty space contains something, mainly virtual particle pairs. From this stems black hole evaporation, zero-point energy, and a host of other theorized events. Time dilation and relativity stem from the paradox the speed of light is both a maximum and fixed constant, independent of your frame of reference. This paradox can be illustrated with a simple clock. Let’s say we have a clock consisting of 3 pieces, two perfect mirrors and a beam of light. It's set up so that the beam of light bounces back and forth between the two mirrors. Thru the wonders of ascii art, the setup would look something like this: ---Mirror--- ^ | | ---Mirror--- Now your job is to measure how fast the light is traveling between the two mirrors and the amount of time it takes the light beam to bounce between the two mirrors. Case 1: The apparatus is sitting at rest in front of you. You measure the distance between the two mirrors and the amount of time it takes the beam of light to bounce from one to the next. You come up with the figure of 2.998 *10^8 meters a second, just as you expected. Case 2: The apparatus whooshes by you. To you, the observer, the beam of light no long takes a straight path from one mirror to the next, instead it travels at an diagonal as it bounces between the mirrors like so: ---Mirror--- ^ / / ---Mirror--- You recalculate the distance between the mirrors accounting for the new path the light is traveling and recalculate the speed. To your surprise, light is still traveling a 2.998*10^8 meters a second, but the kicker here is that the amount of time it takes for the beam of light to travel between the two mirrors is longer than in the first case. This is due to this longer path. The observer just experienced time dilation! To him, the time required for the beam of light to bounce lengthened even though we did nothing more than change his reference point.
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