Thermal Design Basics | Practical Example

Thermal design is one of those things engineers don’t really learn in school and hobbyists often don’t even think about. This article is going to show some basic math with a practical example. One of my portable police scanners has an external 6V jack. To use it in my car I used my standard linear […]
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Simple Arduino SD-Card GPS/NMEA Datalogger

This article is going to show how to build a minimalistic GPS datalogger. The GPS logger is based on the Arduino platform and stores raw NMEA sentences from pretty much any GPS module to a SD card. For a project I needed to log GPS information. I had various GPS modules and plenty of Arduinos […]
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KF5OBS #56: Generating PWM Signals

In this video I’m showing how to generate a PWM signal that’s behaving proportionally to analog control signal. P.S. Watch out for the Dinosaur!
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KF5OBS #55: What is a Gunnplexer? | Police Radar Gun

This video shows a couple of 10 GHz and 24 GHz gunnplexer, briefly explains what they do and shows how they can be used to determine an object’s speed.
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KF5OBS #34: Noise Figure Measurement (Y Factor Method)

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KF5OBS #33: Filter Measurement using Noise Source

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KF5OBS #32: Noise Figure Measurement (Gain Method)

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KF5OBS #30: N-Way Wilkinson Divider Design

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Lumped-Element Wilkinson Splitter / Combiner Design

This is a supplemental article to two of my videos on my YouTube channel about the theory and design of Wilkinson splitters and combiners. A Wilkinson divider is a specific class of power divider with high isolation between the output ports. This feature is particularly useful when used as a combiner. This article will show […]
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KF5OBS #28: Wilkinson Splitter / Combiner Basics

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