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Op-Amp Current and Voltage Offset

No Chip (or man) is an island.

In the last post on this subject, “Our Op-Amp Circuits Input Impedance“, I mostly talked about the the outer two squares on the diagram to the left. Today we will talk about the two inner squares on the diagram. This is some of the things I kind

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Hop on the Bus Gus…. Make a new Plan Stan.

Cryptic title to a pretty much silly post. I want to apologize that posts have been coming out slowly lately. Life has gotten in the way. But things are starting to come back into order and I will be able to post more regularly.

Now the meaning of the title. In a recent post I

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Revisiting the Do-Nothing Machine one more time – The most critical part.

The Working Painted Do-Nothing

During the final final fit of the Do-Nothing Machine I ran into a few more problems. Like always, I eventually worked through the problems and also like always I learned something.

To “honor” the political season getting kicked off this week I decided to paint the Do-Nothing Red White and

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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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Final Fitting of the first Do-Nothing Machine

Picture 1: The end of the last installment

Now that we have the shuttles completed and sliding freely in the base of the Do-Nothing Machine, we are ready to assemble it… or so we hoped. As normal, the way things actually happened, there were more unforeseen difficulties and a few self-created others. However, working

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Hatching and Hatching “Gotchas” LibreCAD Tutorial part 2

In the book “Zen and the Art of Motorcycle Maintenance” the author talks about “gumption traps” … things that take the wind out of your sails and makes you want to give up. I would add to his list software that does not act the way you expect it to act. That means something that

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Post 62B — A correction to a previous post and video.

Oops… I messed up. In my tutorial No, 8 and post 61A about the LibreCAD select functions, I said the following:

A select (or deselect) window drawn from left to right would only select items completely enclosed. This is incorrect. If the window is drawn from top to bottom it will only select items completely

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Post 55D – Some other things about foundations.

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Like always, there are exceptions to the rules, so any time something is written as an absolute fact, watch out – it may not be so. Such is the case in the statement about the traditional method of building footers below the frost line. There is more to learn and this also shows a very

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Post 51B – Sharing of CAD files.

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A schematic I designed and drew in QCAD

Earlier today I recorded a pretty good rant about the problem of sharing files between software that is supposed to work together. I called it “Embrace, Extend, and Extinguish” from the quote made famous in the Microsoft “browser war” trials.

Instead of putting you all through

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Epi-050 — Back Again

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Picture by Oberazzi on Flickr

Back from my “walk-about” and ready to hit it a lick again. I got many things accomplished while I took the break from making content for a week. The most major accomplishment was I now have my computer operating system completely updated with one that will be easy to

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