Fourier Transform : Harmonics or to just get a feel of it

Please visit this link:

http://betterexplained.com/articles/an-interactive-guide-to-the-fourier-transform/


This is really excellent work.

Comments

Post a Comment

Popular posts from this blog

My journey to understand business and evaluation of business - Part 2

Image
      It is important to predict business outcomes for long term of at-least 10 years with good safety margin irrespective of market quotation for success in long term investment strategy.  For this business should have good earning potential in next 10 years. I prefer to follow this strategy as I am not a full time trader. List you circle of competence and go to step 1 only if its inside my circle of competence. Step 1 Predictable earnings - 10 yrs EPS to be found See if it has upward trajectory if there is any anomaly in any years - find the reason behind the anomaly. Step 2 Higher the price you pay lower the rate of return Find the initial rate of return: Price of the stock in current year(x) : Expected earning per share for current year(y) :                                                                  Price of stock in current Initial rate of return(z) :              ----------------------------------------                                                   Expected earning per
Read more

The case where I lost half my worth due to detour from my ideal path of buffet-munger way.

I always tried to learn from the very best in investment business Mr buffet and Munger. I have tried to understand and follow all their method while investing. Even though I tried to follow it I took a detour and it cost me half of my investment. Rules I broke : Always  invest long term. Always buy good business at fair price than fair business at wonderful price. Don't listen to guru's And I did break all the above rules. I happen to follow the modern warren buffet or Shameless clone of warren buffet as he himself advertises. Following where Mr Pabrai's idea of choosing stocks in a youtube video These where tips from him I followed to pick the stock 1.Business that Idiots can run 2. Great Management and Great Business is the way to go. 3. Low Risk - High uncertainty business that are always wrongly priced by markets - Look for stocks with PE less than 3 (More than 3 would be dead stocks or would not move much) - This was the point that killed me. 4. Bankruptcies etc. 5. Up
Read more

Buck converter Basics Notes for Designing and Implementation - PART 2 Simulation

Image
Tried simulating with Qucs The simulation didn't come of well as I hoped.The Output is showing some kind of  waveform I have no idea of looking at how it became so. Simulated Circuit using IRF Z44 Mosfet (Now Vishay MOSFET Z44 )     Simulated Circuit using IRF Z44 MOSFET (Vishay) Waveform I got for Buck Converter Circuit     Now After trying the same in TINA spice simulator from Texas instruments I couldn't successfully produce an output.As I remember from the "Buck converter demystified" reference the ripple current will be maximum at the 0.5 duty ratio.So I have decided to redesign the parameter values for a different duty ratio of 0.25.   New parameters are;     Duty Ratio : 0.25   Period of Switching cycle (SW1) : 20us   Time for which SW1 is ON :0.25*20us = 5us   Ripple Current : 0.33*0.6 = 0.198A   Inductor : 454.54uH   Capacitor  at output (@ 100mv overshoot allowed ) : 262.581uF   In Qucs I made use of t
Read more