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A silly project – just for the fun of it. – A grabber toy.

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

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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 Fourier Series — Part 1

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

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A Plastic Barrel Pontoon Raft – Part 1

This post and video is the first of three describing a raft or platform supported by plastic barrel pontoons. This is the enjoyable part of the process; thinking of the idea and doing the rough calculations. The harder part will be the next video, do some more precise calculations. This is being done because I

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Triangles, The Unit Circle and Radians

The Unit Circle andRadian Measurement of Angles

This is the last of the basic math posts for awhile. The next posts will be about creating a flotation platform that can be used as a raft or floating dock. We will be using much of this math. This one is based around a video like

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A Right Triangle and the Pythagorean Theorem

A Generalized Right Triangle

Tonight’s post is another one on the subject of simple but very very useful mathematics and geometry. The right triangle can seen almost everywhere in the man-made world. Almost everything is build with straight lines usually running horizontally and vertically. Together those would from rectangles, but a rectangle is inherently

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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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Graphical Construction: Drawing a circle tangent to other circles

An actual problem solved. The build of wire making a coil

Tonight’s post is a graphical construction that does not have a built-in function in CAD. Drawing circles tangent to other circles was an actual problem I had to “go back to the books” to solve a problem. The picture to the left is

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Our First Motor – A loudspeaker.

The dross section of a Loudspeaker

It is time to get back into some theory. Almost any project will end up producing some kind of mechanical motion so the understanding of electrical motors and magnetic devices is very important. My way of learning and teaching is to learn one thing very well and then

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Graphical Construction – A line crossing the center line and tangent to two circles.

Tangent to two circles but on opposite sides.

Tonight’s post is again graphical construction and is very similar to the last post. The major difference is the line between the two circles goes to opposite sides of the circles. At first glance this “cross belt” configuration sounds unusual so I included in the video

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