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I am taking a week off.

I have been pushing myself a little too hard lately and been more busy doing than thinking and getting posts out has become work instead of fun. It is starting to show in my posts also. Sometimes it is necessary to “zoom-out” walk around a little, and dream some. It is my time to do

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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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Exponentials and Logarithms

Time constant vs. time.

In the last post, Our First Look at Thermistor details, I talked a little about the exponential increase in resistance as the thermistor was exposed to cold temperatures. Since then I realized we have not talked in detail what an exponential means. Also there is more than one base number

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Our First Look at Thermistor details.

Thermistor Resistance vs. Deg F.

Today we are going to take our first look at a real thermistor and start looking at the problems we will have trying to work with it. The thermistor I have chosen to work with is a 10KΩ at 25 deg C (room temperature) thermistor. It is a reasonable

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Linear scaling with offset.

A line represented with one of the standard formulas

The thermistor circuit we will be working with will require us to do a lot of scaling and manipulation. We will have to try to make a curvy thing becomes as straight as possible. As I thought about that, I realized I never really talked

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LibreCAD tutorial No. 12 – Bevel, Round, Stretch, and double functions

I just posted another LibreCAD tutorial video. I think I have pretty much went through all of the buttons on LibreCAD and the only remaining video to do on it is one with blocks. There are a lot of helpful things you can do for yourself when dealing with blocks and a lot of things

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Analog to Digital Conversion

A 4 bit SAR A to D convertor.

Today we are making a slight turn from the analog world into the digital world. Computers are nice when it comes to crunching numbers and recording data, but somehow we have to get those real-world values into the computer. The device that does that is called

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Popsicle Crane Update no 2

A side view of the boom.

It has been a little bit since I have talked about the popsicle stick crane. Work is still proceeding but there is not a lot to show yet other than a few work in progress pictures.

I have built the main part of the boom and this time

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Programming the Do-Nothing Grinder

The Working Painted Do-Nothing

The problem with doing these posts is that often I don’t have time to finish the things I have started. There are several things I want to finish before I call the do-nothing machine complete. (If you are new to here, a site search for “do-nothing machine” and “ellipsograph” will

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Temperature Sensors for data recording.

Because this site is called Create And Make the goal is to work to projects that give us the excuse to learn some new things. The excuse to learn about Op-Amps was to develop a temperature measuring device. We are still going down that path. Today is a general sort of post where I don’t

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