Dr. Suess grabbing device.
Sometimes projects are highly planned out. Sometimes not. Sometimes you know exactly how you are going to do something because you have lots of experience doing it. Sometimes you try something new and experiment. This was one of those projects were I had very little idea how I was going
Continue reading A silly project – just for the fun of it. – A grabber toy.
Compromises and trade-offs must be made.
Amplitude Modulation, AM, was the first audio radio communications and broadcast method developed and is the easiest to understand. Simply put, there is a continuous sine wave of a given assigned frequency and the amplitude of that wave is changed by a signal. Usually the signal is an
Continue reading Amplitude Modulation, Morse Code and the Fourier Series
The Output Wave Shape of the Diodes in the feedback Circuit.
Now that we have a way of calculating the frequency spectrum of the output from Qucs we can look at the harmonics created by our distortion circuits. The one I was most interested in was the output of the one created by diodes
Continue reading Analyzing the Frequency Spectrum of our Distortion Circuits.
Fig 1: Initializing the Python Fourier Transform Program
Tonight’s post is again about the harmonic frequencies present in waveforms that are not simple sine waves. I needed a way to analyse the outputs of the circuits we were simulating in Qucs. To do that I had to create myself a tool. I wrote a
Continue reading Finding the frequency components of a Qucs Output.
A clamp in the feedback circuit.
In the last post we added distortion by simply over-driving an amplifier to the point where it clipped, or squared-off the top of the waveform. It basically said…”that’s all I can do… I can’t do no more”. In this post and video I show two simple op-amp circuits
Continue reading Sprouting Fuzz part II – Clamping a Signal
An amplifier Clipping a Sine Wave.
Finally we are back to circuits and not just talking numbers and math! First, we will do a little summary of what we have recently talked about. Any repeating waveform can be derived from a sine wave and one or more harmonics of that sine wave. A harmonic
Continue reading Sprouting some Fuzz. Creating Distortion in an Amplifier
A screen shot of my video.
Upgrading the operating system is always taking a chance. It is a lot like jacking up the whole house, replacing the foundation under it and hoping everything works out. I upgraded my Ubuntu from version 12. something to 14.04 and everything was wonderful until I attempted to run
Continue reading Sometimes it really does work out.
The frequency Spectrum of a Sine Wave. (Click on the picture to expand it.)
Distortion is something that is unwanted in music reproduction systems. Those systems used to be advertised as high fidelity and claimed to reliably reproduce the sound files sent to them from phonograph records, audio tapes, etc. I have not heard
Continue reading Purposeful Distortion or It is Cool to be Square
So far with the Fourier Series we have made some interesting waveforms but what happens in real life? Things are never as clean in real life as on paper. (Except maybe my smudged up papers.) If you think of a perfect square wave with an infinite number of odd harmonics, what would
Continue reading Why both Sines and Cosines with the Fourier series?
A Fundamental and odd harmonics from 3 to 101
Tonight’s post is about adding multiple sine waves to create another waveform. Each of the sine waves is an positive integer (whole number) multiple of the frequency of the base sine wave. These additional frequencies are called harmonics of the the base frequency. The base
Continue reading The Fourier Series — Part 1