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Transformers and mutual inductance, but probably no mutual admiration.

A SMALL STEP-DOWN TRANSFORMER.

Tonight’s post is about two coils tightly coupled on a common iron core. When the fields of two (or more) coils affect each other it is said they have mutual inductance. I thought seriously of embedding an old song by Teresa Brewer called “Mutual Admiration Society” but in the case

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Real Inductors and a couple of real life stories about them.

The magnetic field around a coil of wire.

When I started down this path of talking about inductors in the post “Through the looking glass – Duality – The Inductor”, I chose to make a big deal about how the magnetic fields build and collapse. That was done for several reasons. First the magnetic

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Inductors and Alternating Current and ELI the ICE man.

The rate of change throughout a sine wave cycle.

In the last posts about an Inductor, Through the Looking Glass – Duality -The Inductor” and “The Inductor – Part II” my goal was drive home the idea of duality: It is very similar but sometimes a mirror image of capacitor so I was jokingly

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Solar Energy Book Review and Recomendation.

If you have followed my blog for very long, you have come to realize there are a lot of details on just about every subject. First you need to know the basic principals of the subject you working with, possibly some math, and then the critical things about the construction techniques and materials. Some of

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The Inductor – Part II

The Inductor circuit.

In the last electrical post “Through the Looking Glass – Duality – The Inductor“, I spent a lot of time building up the fundamentals of electromagnetism and what is going on inside the inductor. I also probably over-used the “twisted sister” analogy, but I will continue with that because we are

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An overview of heat solar collectors.

Solar Energy Concepts

In the last post, “Where is the biggest bang for the buck in solar energy?” , I hope the data was convincing that the best place to use your time and money is toward heating your house and possibly the hot water you use. Tonight’s post is going to work from

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Energy Storage – Capacitors – Equalization of Pressure

A Low Voltage Electrolytic Capacitor

In electrical theory we have so far been dealing with unchanging or very very slowly changing values. Tonight’s post is the start of talking about changing values of current and voltage. We are still talking about Direct Current, but we are starting to change the course of the path

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Where is the biggest bang for the buck in solar energy?

Solar Energy Concepts

Tonight I thought I would start pointing the direction we will be going toward solar energy. Like in all projects the first thing to determine is where do we want to go. I am going to make the first assumption. We want to use our money in the most effective way

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Efficiency and Effectiveness and Solar Energy.

Tonight’s post was intended to kick-off a discussion about solar energy, but as I was formulating how I was going to present it I kept running into a word … efficiency. I know the thermodynamic use of the term very well, but we often throw the word around to mean lots of other things. That

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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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