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 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.
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 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: 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.
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.
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.
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.
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.
The MIT Age Lab recently worked with Monotype Imaging in an investigation of effects of typeface on the demand of human-machine interactions during a simulated in-vehicle point-of-interest (POI) menu selection task. Their study showed that people could perform a menu selection task faster and with more accuracy depending upon the text type used as well as white text on a black background vs. the standard block text on a white background. Differences were clearly noted.
One of the key themes throughout my tour of CES 2015 exhibits was the wireless of infrared control of the Smart Home. Using your Smart Phone or Tablet, exhibitors showed how you could easily control many functions in your home.