A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.

DC to DC conversion, what a buzz.

A fairly small relay.

Today I will take a step back into time, back before computers and even solid state electronics. The electrical properties have been there since the beginning of time. We have learned newer and better ways but often all we have done is the same things that were done before, but

Continue reading DC to DC conversion, what a buzz.

Circles and Cycles

Header

Sine and Cosine.

I created a video over the weekend showing the relationship of a sine wave to a cosine wave. The cosine wave is shifted 90 degrees from a sine wave. (Think Capacitors and Inductors!!! Deja Vu all over again!!!)

First, I create the two waveforms using the unit circle method and CAD.

Continue reading Circles and Cycles

Tone Controls, a use for the frequency response of capacitors.

Treble Cut Tone Control Circuit

“Daddy sang Bass and Momma sang Tenor”… Maybe today we don’t want to hear Daddy or maybe we only want to hear Daddy. Tone controls are a nice thing on most stereos and radios and it is a good chance to put all the theory we have been talking

Continue reading Tone Controls, a use for the frequency response of capacitors.

Printed Circuit Boards – Part II of Creating our Masterpiece.

A Recent Built Electronic Kit.

Last night I discussed the basics of laying out a circuit board. Tonight I will discuss some about how boards are constructed. The picture to the right is a fairly simple printed circuit board, PCB, that came as part of an electronic kit I recently bought. It will be

Continue reading Printed Circuit Boards – Part II of Creating our Masterpiece.

Making our Electronic Masterpiece

The Final Thermistor Circuit.

The hard part of our electronic design is over… Well sort of. We are just moving into a new phase of it, but at least we will not be talking theory. Finally we are actually going to mount parts to something and start thinking about how we will get it

Continue reading Making our Electronic Masterpiece

The impedance, Z, and Power triangles.

The Impedance Triangle.

Alternating current added a new complication to Ohms law. If we are working with only resistance, there is no problem as long as we use RMS values for volts and current. The math works great including the calculation for power. However, as soon as we added inductance or capacitance things started

Continue reading The impedance, Z, and Power triangles.

The process of Creating and Making

The hub cap I found

This last week I have received some great e-mails. This post is not so much deep analysis like most of the ones I post, but more about having fun creating and making things. It is also an example of my reply back to Michael about the process of creating

Continue reading The process of Creating and Making

Transformers – Part 2

Old Smokey – 70 VA transformer.

Tonight’s post is relatively short compared to last night’s post. Last night I wanted you to really understand how the load on the secondary is reflected back to the primary through the magnetic coupling. It was primarily about concepts. Tonight’s post will talk about one other function transformers

Continue reading Transformers – Part 2

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

Continue reading Transformers and mutual inductance, but probably no mutual admiration.

The Thermistor Circuit is Complete. Finally!

The Final Thermistor Circuit.

Because of the loose tolerances used in electronic components designing circuits is not as easy as it sounds if you need close tolerances on the final circuit. Adjustable components and some sort of calibration procedure helps and are necessary, but making sure those adjustments can cover the complete range of

Continue reading The Thermistor Circuit is Complete. Finally!