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A Right Triangle and an Introduction to Trigonometry

Basic Trig Formulas

I have just created another video about some basic math. This one is about what is probably the most useful branch of mathematics for practical work, trigonometry. I am not going to bore you here with a repeat of what is in the video, but what I will do here is

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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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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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LIbreCAD – Testing Line Widths & Line Types

US_L:_Border_TEST_X1

I use LibreCAD quite a bit to produce drawings for this blog. I do not use it very often to print out drawings and I got curious about a few things.For example: Does the line with change when a drawing is plotted at a different plot scales? Does the spacing within a line

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Good ole boy Calculus

Our Car with no air friction

Sometimes I get stuck. I have turned this blog into somewhere between a technician type of discussion and full-blown engineering. Many very good technicians I know are very good a fundamental understanding and have almost a magical sense of understanding a problem. Those same guys give you a

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Short term energy storage, time delays, and oscillations.

We are quickly getting toward the end of our talk the theory of the thermistor circuit and will soon move that into construction. While construction is interesting, it is tough to create frequent posts of interesting content, so we are very soon going to move into some energy storage components. In electricity those are inductors

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Analysis of the movement of the Do-Nothing Machine

The circumference of an ellipse with a 8″ minor axis and 12″ major axis

This weekend I completed the program to produce data about the do-nothing machine and analyzed the data using a graphing program called Veusz. I answered some of my questions about the motion as well as I found a surprise. There

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A new LibreCAD tutorial – toolbars and the divide function.

I am self taught on LibreCAD although I have used other CAD programs. I have learned some things since the first tutorials that can save some keyclicks. I think I have one more tutorial coming on these miscellaneous functions and then I will spend some time creating some blocks and show as much about the

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Converting from English to Metric and a use for Layers in LibreCAD

I drew a CAD drawing of a popsicle stick using the English Units and wanted to also create one in metric units. I was curious if LibreCAD would automatically calculate the correct values in the dimensions when I did that. It doesn’t. However, it was worthwhile to create a video to show how I

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Post 53A – Calculating Buoyancy of a piece of PVC Pipe.

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UPDATE: I have added several new posts with a better way of creating a raft. PVC Pipe would be an expensive way of getting the job done, Plastic Barrels would be much much cheaper.

Please check out the following four posts. A Plastic Barrel Pontoon Raft Part 1

A Plastic Barrel Pontoon Raft Part 2

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