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Why both Sines and Cosines with the Fourier series?

Phase Shifting.

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

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The final analysis of a floating barrel. Flotation Part III

Bouyancy calcs for greater than 50% immersed.

Tonight’s post is the last of the posts about buoyancy and calculating the lift of a plastic barrel immersed in water. This shows the calculations for a barrel supporting a weight causing the barrel to be immersed greater that 50%.

The calculations are very similar to the

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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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Stiffening up the Homemade Box and Pan Brake

The brace to stiffen the box and pan brake.

After doing a lot of work in previous tests I determined the brake could get the job done on small pieces of metal but just could not get it done on longer pieces because the hinged board was bowing when I applied the force necessary

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Drawing the Schematic for the Desulfator in Kicad.

The Desulfator Schematic in KiCad

HAPPY NEW YEAR! Usually this time of year I think about what I accomplished in the last year and also where I want to go in the next one. I have been so busy this season that I really have not given it as much thought as usual. However,

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LibreCAD Tutorial – Adding Blocks to the Parts Library

A small library of nuts

In this tutorial we are taking the library of nuts we have created the final step and adding them to the Library Browser. Although this sounds as if it is a minor step there are a lot of gotcha’s and things to think about. Foremost of all is as

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LibreCAD Tutorial – Building and Using a Library of Parts.

Finally we are to a point of building a library of parts to use over and over in different drawings. In this video I show one way of using a library of those parts in your actual drawings. I call this the cut and paste method. In the next video I will show you

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LibreCAD Tutorial – Using Blocks Part 2

This is a continuation of the previous post: Using Blocks Part 1. Many modify functions in LibreCAD work fine with blocks. These functions such as trim, scale, copy, and mirror do not affect the block. However, functions such as round, bevel, & stretch would modify the block so those cannot be used with blocks. Please

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A new LibreCAD tutorial – Blocks Part 1

No. 6 Nuts

When designing a project, often the same things are used over and over. It is good to have these available for easy insertion into a drawing. These are called blocks in CAD and can be thought of similar to “rubber stamps”. These are helpful, but some planning and thought must be

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