Archive for the ‘homebrew’ Category

Measuring Impedance

I saw a video today from one of the Youtube members that I subscribe to: Kevin Loughin KB9RLW.  In the video he was demonstrating how to use an oscilloscope and a signal generator to measure the impedance of a circuit ( in this case, it was simply a toroid coil).  The process made sense, but […]

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August 2017 Eclipse High Altitude Balloon Flights

The ham radio club that I am a member of supported two high altitude balloon flights from the area of Glendo, Wyoming on August 21st, 2017.

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ANSR Ground Station Tracking System

In support of the Arizona Near Space Research group, I have agreed to set up a new ground station for tracking the balloon flights.  We do this in order to point directional antennas at the balloons as they float across the state on their missions.  I had done this about 10 – 12 years ago […]

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ANSR – Arizona Near Space Research work

After having taken a break for a few years, I have renewed my membership in the Arizona Near Space Research group.  This is a club that specializes in high-altitude balloon launches that carry payloads typically designed and built by students ranging from Jr. High to Post Graduate levels.  I was involved in the club shortly […]

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A 24 Volt Sealed Lead Acid Battery Charger (Part 3)

In Part 1 of this project, we covered the general design of the battery charger.  Part 2 described the physical construction of the charger.  In Part 3, we will cover the calibration and operation of the charger, and present the Arduino Nano source code for the project. Once the board was populated, I isolated the […]

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