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.

Analyzing the Frequency Spectrum of our Distortion Circuits.

The Output Wave Shape of the Diodes in the feedback Circuit.

Now that we have a way of calculating the frequency spectrum of the output from Qucs we can look at the harmonics created by our distortion circuits. The one I was most interested in was the output of the one created by diodes

Continue reading Analyzing the Frequency Spectrum of our Distortion Circuits.

The final analysis of a floating barrel. Flotation Part III

Bouyancy calcs for greater than 50% immersed.

Tonight’s post is the last of the posts about buoyancy and calculating the lift of a plastic barrel immersed in water. This shows the calculations for a barrel supporting a weight causing the barrel to be immersed greater that 50%.

The calculations are very similar to the

Continue reading The final analysis of a floating barrel. Flotation Part III

The September Equinox and Look at what I just found!

Sine and Cosine waveforms.

Today is an equinox, a day of the year when the length of of time between sunrise to sunset is equal to the time between sunset to sunrise and the sun is directly overhead of the equator. Here in the northern hemisphere it is the autumn equinox and nights will

Continue reading The September Equinox and Look at what I just found!

A Plastic Barrel Pontoon Raft – Part 2

Breaking down the Problem into important areas.

This post and video is a continuation of the previous post. However, it is also much more. By calculating the lift of a partially submerged barrel we can estimate how high our raft will float in the water and how much we can load the raft. To

Continue reading A Plastic Barrel Pontoon Raft – Part 2

A Plastic Barrel Pontoon Raft – Part 1

This post and video is the first of three describing a raft or platform supported by plastic barrel pontoons. This is the enjoyable part of the process; thinking of the idea and doing the rough calculations. The harder part will be the next video, do some more precise calculations. This is being done because I

Continue reading A Plastic Barrel Pontoon Raft – Part 1

Buoyancy and Archimedes’ Principle.

Buoyancy of a partially Immersed container

Before I get into the material of this post I need to make one announcement. For some reason Hotmail and related services seem to be not delivering a lot of the e-mails for the subscription service. When I get one of those I unsubscribe the e-mail address. It

Continue reading Buoyancy and Archimedes’ Principle.

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

Continue reading A Right Triangle and an Introduction to Trigonometry

Cartesian Coordinates Part 2 – Moving from Pt. to Pt.

A Cartesian Vector

Being able to map points on a Cartesian Coordinate System is all well and good, but sooner or later we will need to know how to move from one point to another. This post is the first baby-step in that direction. A line pointing from one point to another is called

Continue reading Cartesian Coordinates Part 2 – Moving from Pt. to Pt.

The Cartesian Coordinate System Part 1

Points on a Catesian Coordinate

Today’s Post is in many ways a back-up and regroup post. I think this will be very easy for most people. However, I needed to build a good foundation of ideas before we proceed head-long into the complicated stuff where we have already been. Also, this is probably a

Continue reading The Cartesian Coordinate System Part 1

Using the Transistor D.C. Model – Our first circuit.

The first circuit we will analyse.

In the post “The Basic DC Model for a NPN Bipolar Junction Transistor” we came up with a generic model for a transistor and in the last post “Reading a Datasheet for our DC Transistor Model Parameters” we assigned values to the parts of the model based on

Continue reading Using the Transistor D.C. Model – Our first circuit.