A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.

Amplitude Modulation, Morse Code and the Fourier Series

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

Print Friendly

Analyzing the Frequency Spectrum of our Distortion Circuits.

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.

Print Friendly

Sprouting Fuzz part II – Clamping a Signal

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

Print Friendly

Sprouting some Fuzz. Creating Distortion in an Amplifier

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

Print Friendly

Purposeful Distortion or It is Cool to be Square

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

Print Friendly

How a GFCI operates and why it requires no ground.

Magnetic field around a wire with the conventional current flowing into the page.

Way back, a long time ago, I started introducing the idea of inductance in a post called “Through the Looking Glass – Duality – The Inductor“. To start talking about inductance it is necessary to talk about electromagnetism and that is

Continue reading How a GFCI operates and why it requires no ground.

Print Friendly

Examples of Problems with Grounding Electrical Systems

Faking out the Ground Plug.

Tonight’s post is a continuation of the last post “Grounding and Neutral in Power Wiring” and I am going to show a couple of examples of problems with grounding in power and even instrumentation and audio systems. Some of these problems are in my opinion still not resolved and

Continue reading Examples of Problems with Grounding Electrical Systems

Print Friendly

Grounding and Neutral in Power Wiring.

Partial diagram of typical wiring for a residence.

Recently I changed a setting on this blog to put no time limit for comments and I got a very interesting comment/question in the post: Ground, Common, Neutral, Reference, and Buses. I am not going to repeat the question and my answer here, but that question

Continue reading Grounding and Neutral in Power Wiring.

Print Friendly

Several Announcements and another Qucs Video.

Qucs video Part 5

This post is an announcement of several things. As usual I am going to change direction for awhile for several reasons. First the Big Announcement. Create-and-make is the featured website for this week on an outstanding Website for the Electrical Engineering Community, EEWeb.com, A link to the feature and the

Continue reading Several Announcements and another Qucs Video.

Print Friendly

Qucs – Documentation, the Net List, and the Component Library

Title screen of the new video.

I hope by now I have many of you interested in using Qucs for simulating electronics circuits. This is another blog wrapped around a video I have posted. I still do have my “love – hate” relationship with simulations. You can do a lot very quickly with simulations,

Continue reading Qucs – Documentation, the Net List, and the Component Library

Print Friendly