If you're a true BEGINNER.. then this circuit might be a little too hard for you.
There is a DC Voltage source (represented by the 12V battery symbol) and an AC Source (the circuit with the sine wave in it- 120V 60Hz).
So your network is going to have a mixture of DC currents and AC...
My friend asked me a question that totally shocked me for a second.. here was the question...
"Is a voltage source turned off the same as a voltage source outputting 0V or near 0V?"
Then he asked me if we connected the two terminals of a voltage source to two points on an already...
hmmm
Yeap... that's what i was saying in my message
I don't think high speed clocks are closer to sine waves than rectangular... i would suspect there are a couple harmonics at the very least.. i work on systems with 160 Mhz clocks.. and there are harmonics
Yes but..
Yes, there can never be a true square wave (digital) signal in any type of medium.. because that would require an infinite bandwidth...
The digital pulses in high speed circuits have rounded edges, but they still have a "rectangularish" shape... like a rectangular waveform with...
Hmmm
Without looking up any references, what comes to mind is simply plugging in the time domain function of the current into any DC formula you have.
For example.. the formula probably has a capital I in it... change that to small i then find the time domain function for i
like,
i =...
Remember one thing
Whoever said that transmission lines can handle higher frequencies than 3Ghz so it wasn't a big deal... remember one thing...
3Ghz is the frequency of the pulse wavetrain produced within the Penitum 4... these are not sine waves... but have considerable higher order...
Add the following sine waves
y= Asin(wt) + Bsin(wt + x) Where w=2(pi)f and x is a phase shift
I SIMPLIFIED this for my friend using rotating vectors, then i got really annoyed realizing that I didn't know how to do it the direct way (trig identities).
So I've posted it here for...
This is fun...
prove that:
arctan(x/y) - 90degrees = -arctan(y/x)
I had to do this recently for an electrical engineering problem (in an interview actually). It's ahrd at first, but once you picture things it comes fast.
Hmmm...
It's true that the voltage across the inductor sinks as more current is supplied through it (because that current will also drop across the R in the circuit.. and to obey KVL, inductor voltage sinks!)
But why does the current's rate of change slow down? (without calculus or anything)...
FF is a type of Latch
Using a Latch, you can make a Gated Latch.
Using a Gated Latch, you can make a Flip Flop.
So, FFs are a subset of Gated Latches, which are subsets of the basic Latch (two transistors).
Have you tried using a 74LS series Gated latch chip (don't remember exact...
High current 12V regulator
I don't suggest the resistor idea either (I really don't know how that works, nevertheless, i don't think it will either)
You can't get high currents (over 1.5A) 'from' a 7812.
But! You can get high currents 'using' a 7812 (even 50A).
Just use a bunch...
Most people understand (gut understanding) the charging of capacitors more than that of inductors. They just apply the duality to inductors and move on (without seeking the same understanding of inductors).
Teachers of my past never could explain exactly why the charging of a capacitor...
Generator creates Photons
An electric generator's purpose is to creat photons (electromagnetic energy).
Electrons are forced to move.. but they're purpose is just to create current and thuse the magnetic field component of the EM energy.
A flow of energy rushes down transmission lines...