Recent content by rusty009

Hi, I am trying to find out if a system is bounded (stable) or not, and I don't understand the process, I basically have these two functions, y1[n]=n2*x[n] y2[n]=x4[n] According to my notes, y1[n] is not stable, as the output is proportional to n2 which is not bounded, I understand...

...And a thank you to SGT from me ! ;)

Hi all, I'm having trouble solving this matrix problem, basically I have, s=r*H where s = [ 1 1 0] and, H= 1 0 1 1 0 0 0 1 1 0 1 0 1 1 0 0 0 1 I am trying to find out what the matrix r is but it won't work in matlab. I have tried...

Hi all, I am trying to design a lowpass filter using the following conditions Passband edge f = 10 Khz (Ωp) passband stop f = 30 Khz (Ωs) Minimum stopband attenuation = 50db (1/A) Maximum passband attenuation = 0.4db( 1/\sqrt{1+ε2} ) and am having quite a lot of trouble with it. I have tried...

Hi, someone just asked me this on MSN and it's bugging me, here's the question 30 card players want to play in 6 groups of 5 every month, such that no player ever plays with another player again in a subsequent month. What is the maximum number of months that the players could play...

Ok, sorry for this basic question, I am currently designing a sallen-key high pass filter using a TL072 opAmp, with the schematic shown below, This circuit is connected to a piezo trasnducer whose signal I wnat to amplify. I was wondering, what do I connect to the Vcc+ and Vcc- pins of...

Hi, was just wondering if anyone could help me out with this query, I'm just curious to know why high frequency acoustic waves are greatly absorbed underwater? Thanks in advance.

Read my post, at no point did I try to prove god does not exist, I put out my reasoning for why I thought science can't prove if god does or does not exist !

Before I start the discussion, I would like to point out that I am not a very religious person neither am I an Athiest, I’m not trying to provoke any science Vs religion argument, would just like you to share your thoughts. Ok, my understanding of science is that it is an analytical subject...

Hey, I am trying to measure and profile the density variation across a food wafer approximately 2 mm thick, I'm trying to find a method that will soley measure the density of the wafer and this method should be non destructive(the wafer can't be harmed). I have tried to do some research around...

thats exactly what i want, thank you !

Hey guys, I have a quick question concerning partial fractions, say i have the values A(..)+B(..)+C(..) and i can only get A b substituting a value for x, but I can not make A or C go zero or A and B go to zero at the same time, if you understand ? How do I get the values B and C ? I remember...

Hey, say I have a transfer function, G(s) = s/(6.25+s) How would I calculate the time constant for this transfer function? Also, if I wanted to sketch a bode plot for this transfer function, would I split it up into s* 1/(6.25+s) ? Thanks in advance.

I've looked through that but I still don't understand what is actually happening.

Hey guys, I recently conducted an experiment which involved charging a battery via a PV module and also logging the I and V values to calculate conversion efficiencies. I also logged the I and V values from two other circuits with a fixed resistance. I understand that every irradiation has a...