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Aubrey Kagan
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An AC Current Generator, Part 4
Aubrey Kagan  
1/13/2015   3 comments
In parts 1 through 3 I described the construction of the transformer we needed to generate the 10Amps AC. We still had to drive the transformer.
An AC Current Generator, Part 3
Aubrey Kagan  
12/26/2014   10 comments
Part 3 of AC Current Generator blog
An AC Current Generator, Part 2
Aubrey Kagan  
12/11/2014   3 comments
When testing, a 10 amp AC current is fed into the module being tested (DUT) and the current is measured across a 25 mΩ shunt internal to the DUT.
An AC Current Generator, Part 1
Aubrey Kagan  
12/1/2014   9 comments
I wrote an article on this topic in 2000 that was published on Circuit Cellar Online. I believe that the basic information that I wrote about is still relevant and so I am rewriting the article as a blog.
Power Dissipation: My Arch-Nemesis
Aubrey Kagan  
9/3/2014   15 comments
Experience should have taught Aubrey Kagan to consider power dissipation before introducing a component into a design. Unfortunately, it always seems to come back to bite him.
Potentiometers: Mechanical & Electronic, Part 2
Aubrey Kagan  
8/18/2014   37 comments
I now hope to cover the comparative advantages and disadvantages of both mechanical and electronic potentiometers.
Potentiometers: Mechanical & Electronic, Part 1
Aubrey Kagan  
8/11/2014   12 comments
As I understand it, there are two different reasons for using an adjustable resistor.
How a Coffee Packaging Machine Educated Me
Aubrey Kagan  
7/18/2014   29 comments
One of my first projects was to design a control for a coffee packaging machine. It was in the late 70s and microprocessors were on everybody's lips, but few actually knew anything about them.
Excel-Optimizing Resistor Ratios, Part 2
Aubrey Kagan  
6/18/2014   13 comments
Aubrey Kagan has completed the series on Excel that he set out to write nearly two years ago.
Excel-Optimizing Resistor Ratios, Part 1
Aubrey Kagan  
6/10/2014   19 comments
I have often wondered whether the practice of using a ratio of two resistors to determine a particular output is a fundamental property of electronics or a concerted effort by designers.
Excel: Using the Validate Data Feature
Aubrey Kagan  
6/2/2014   4 comments
In this blog I will attempt to show how to use the data validate feature to simplify data input to a worksheet.
Excel: Taken for Granted, Part 3
Aubrey Kagan  
5/27/2014   38 comments
Documentation of all projects is important, and Excel provides a method for that by allowing comments to be associated with a cell.
Excel: Taken for Granted, Part 2
Aubrey Kagan  
5/22/2014   32 comments
Moving around an Excel worksheet, especially a large one, can be challenging.
Excel: Taken for Granted, Part 1
Aubrey Kagan  
5/7/2014   22 comments
When I started my blogs on Excel, I launched straight into it without any mention of some of the simple features that you may or may not know. As I move on, I think perhaps I should cover some of these features.
Temperature Measurement, Part 5
Aubrey Kagan  
4/25/2014   34 comments
This is the conclusion of Aubrey Kagan's series on temperature measurement.
Temperature Measurement, Part 4
Aubrey Kagan  
4/25/2014   49 comments
The topic of integrated temperature sensors.
Temperature Measurement, Part 3
Aubrey Kagan  
4/21/2014   17 comments
The basic sensor is normally just a diode, and you could stick with just that if it suits your purposes.
Temperature Measurement, Part 2
Aubrey Kagan  
4/3/2014   13 comments
In this blog I will deal with converting the temperature into electronic signals and start with purely analog conversion.
Excel: Conditional Formatting
Aubrey Kagan  
3/12/2014   40 comments
When you right click on an Excel worksheet cell, you can change its numeric type, alignment, background color, and other properties. But did you know that you can have the cell change its format if different conditions are met?
Temperature Measurement, Part 1
Aubrey Kagan  
3/6/2014   29 comments
This series of Temperature Measurement blogs was first published on the late, lamented forum, Microcontroller Central. I have modified it very slightly.
Microsoft Excel: Tips & Tricks for Lookup Tables
Aubrey Kagan  
1/30/2014   20 comments
Excel includes lookup tables that can be accessed in an interesting number of ways. The tables Aubrey Kagan presents here are vertical, but there will always be an equivalent function in the horizontal axis.
Excel Curve Fitting & Linearization, Part 2
Aubrey Kagan  
1/9/2014   8 comments
Excel has capabilities to do curve fitting based on collected data -- and it's far easier than doing the work by hand.
Excel Curve Fitting & Linearization, Part 1
Aubrey Kagan  
1/8/2014   26 comments
Excel has capabilities to do curve fitting based on collected data -- and it's far easier than doing the work by hand.
Analog Isolation Techniques, Part 3
Aubrey Kagan  
12/13/2013   6 comments
Galvanic isolation of signals can be difficult. Isolation of analog signals can be even more difficult. Here are some techniques to explore and devices to use.
Analog Isolation Techniques: Part 2
Aubrey Kagan  
12/12/2013   6 comments
Galvanic isolation of signals can be difficult. Isolation of analog signals can be even more difficult. Here are some techniques to explore and devices to use.
Analog Isolation Techniques: Part 1
Aubrey Kagan  
12/11/2013   Post a comment
Galvanic isolation of signals can be difficult. Isolation of analog signals can be even more difficult. Here are some techniques to explore and devices to use.
Using Solver in Excel, Part 2
Aubrey Kagan  
11/7/2013   18 comments
One of the add-ins for Excel is Solver. It allows you to easily solve problems with multiple variables. Here's how to install and use it.
Using Solver in Excel, Part 1
Aubrey Kagan  
11/6/2013   16 comments
One of the add-ins for Excel is Solver. It allows you to easily solve problems with multiple variables. Here's how to install and use it.
Trace Signals From Behind Closed Doors
Aubrey Kagan  
10/24/2013   6 comments
A repost from the former Microcontroller Central of a blog on modular, portable 'scope/data acquisition system.
Using Data Tables in Excel
Aubrey Kagan  
10/2/2013   18 comments
Using the Data Table capability in Excel to explore the results of varying one or two component values in a circuit.
Calibration, Part 2
Aubrey Kagan  
9/20/2013   7 comments
Continuing the discussion from Part 1, how do you ensure accuracy? How do you perform the calibration? On what reference is this calibration technique based? How does noise affect calibration?
Calibration, Part 1
Aubrey Kagan  
9/9/2013   20 comments
Analog measuring devices should be calibrated to ensure accuracy. How do you perform the calibration? At how many points? And on what is this calibration technique based?
RMS Measurement
Aubrey Kagan  
8/23/2013   12 comments
How do you make a true RMS measurement of a complex (non-sinusoidal) waveform? There are various techniques.
Explore Design Sensitivity Using Excel's Scenario
Aubrey Kagan  
8/9/2013   1 comment
Excel can not only perform some of your design calculations, it offers a relatively quick way to perform "what-if" analysis.
Use Excel Goal Seek to Solve Design Equations
Aubrey Kagan  
6/21/2013   Post a comment
Aubrey (long accused of being an Excel evangelist) offers a tip on a quick way to solve design equations using, well, Excel.




latest blogs
As an engineer, eventually you will have to insert an equation into your written work or presentation. This can be a struggle as equation editors are not always the friendliest. However, there is good news. The equation editor in Word has improved immensely (I am using version 2010 here). In this blog we look at how to insert an equation into a Word document. As a bonus, there is information on how to insert an equation into a web page with an html code generator website.
Wait a minute. Let’s see if I understand this. (Here I’m channeling you, the puzzled reader, after you’ve grabbed me in the coffee break of a Filter Wizard lecture morning). The frequency of the nth harmonic of a sinusoid is n times that of the fundamental. The nth harmonic distortion is defined as the ratio of the amplitude of the nth harmonic to the amplitude of the fundamental. So the 1st harmonic distortion is… the ratio of the amplitude of the fundamental to the amplitude of the fundamental and that’s… unity. I. Do. Not. Understand.
Single-ended signals are very common, but increasingly signal paths are being converted to differential signals as part of the signal chain. The benefits of differential signaling are particularly appealing with low supply voltage systems and for driving analog-to-digital converters (ADCs).
If you spend any time at all looking at alternative energy sources such as wind power and solar energy, you'll quickly discover one inconvenient truth: alternative energy production is both highly unpredictable and uncorrelated to energy demand.
When Radio Shack announced that they were closing stores, unfortunately the one in Cupertino (De Anza Blvd.) was one of them.
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