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A most useful tool and some announcements.

Measuring a coil diameter

Tonight’s Post is in some ways almost an embarrassment to admit. I have finally purchased a digital calliper and have found it to be one of the most useful tools I have ever purchased. Before going into details about that I have a few announcements to make about this website

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Processes and Projects Part II: Hydroponics vs. Aquaponics

Hydroponic grown lettuce

This post is another general post about processes and projects. It is specifically about me making the choice this year to go with hydroponic growing of some vegetables. Originally I hoped to do aquaponics, but there are just too many difficulties to overcome in a short time and I wanted to

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Processes and Projects.

Tonight’s post is a shift in direction. (Only momentary for those of you that want me to get back into the electronics… we will return.) I have been very busy the last month setting up a hydroponics garden. This is the first of a series talking about using the process of gardening to lead me

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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

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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

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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

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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

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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,

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Using Qucs with a Non-linear Model of a Transistor.

The opening screen to the new video.

Tonight I posted a new video. The video shows how to find the parameter values for a non-linear model of the transistor. This is the best possible model. However, remember it is just a model and there is significant manufacturing tolerances in transistors. The simple model we

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