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Finding the frequency components of a Qucs Output.

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

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A Lead-Acid Battery Desulfator – a reason to learn KiCad

Partial Schematic for the Desulfator

Not every project has to be your own design. However, it is good to understand the design once you do copy and build a design. That way you can modify, extend, and enhance the design to make it the way you want it to be. There is another very

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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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The Hinged Plate for the Metal Brake.

The design I am going with for the small metal brake

The old statement is: “Why are babies small?” Answer: ” So they don’t have very far to fall while trying to learn to walk”. The point of the statement is: When trying to do something new it is always best to try to

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The Incredible Shrinking Drawing and a Good Website.

Tonight’s post will be very short, but it actually will be about two subjects. First I am embedding a new video I have created about CAD. Second, I am going to recommend a web site about electrical and electronics theory.

Some co-workers told me about the website All About Circuits. The site is very well

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Thinking my way toward the ideal sheet metal brake.

a generic pan.

There is a term called “paralysis by analysis”. It is the trap a person can fall into trying to create perfect and never getting anything done. However, there is also a term for going out and purchasing something that sounds great, and then finding it will not do the job. It

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Using Manufacturers drawings in LibreCAD

A manufactures drawing being used in LibreCAD

Many manufacture’s have dxf files of their products available for download. These can be used in LibreCAD as well as the high-priced proprietary CAD programs. In the embedded video I show how you can download and use these files for components in your projects.

The example I

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