Dan Koellen AI6XG 

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    Reactive Component Measurement With the NanoVNA
    Dan Koellen AI6XG
    • 6 days ago
    • 6 min

    Reactive Component Measurement With the NanoVNA

    Exploration of using the nanoVNA to measure inductance and capacitance at frequency of use.
    35 views0 comments
    Toroid Transformers - How Hot Will It Get?
    Dan Koellen AI6XG
    • Mar 2
    • 11 min

    Toroid Transformers - How Hot Will It Get?

    There are a number of factors in choosing a toroid for a RF transformer. While one may model electrical performance, calculate predicted...
    219 views0 comments
    Electrostatic Discharge (ESD), Does it Matter for Makers and Hackers?
    Dan Koellen AI6XG
    • Jul 20, 2021
    • 9 min

    Electrostatic Discharge (ESD), Does it Matter for Makers and Hackers?

    Electrostatic Discharge (ESD) is a subject that can inspire a lot of discussion, head shaking and some misunderstanding. ESD damaging...
    505 views0 comments
    Don't Fear the Smith Chart
    Dan Koellen AI6XG
    • Jun 16, 2021
    • 13 min

    Don't Fear the Smith Chart

    Like many radio amateurs I was initially intimidated by the Smith chart. Transmission line and antenna theory, unfamiliar terms and...
    539 views0 comments
    How I Killed a Microcontroller
    Dan Koellen AI6XG
    • Apr 25, 2021
    • 9 min

    How I Killed a Microcontroller

    This blog outlines the steps taken to determine why a microcontroller no longer works, and the journey to find the damage on the chip.
    156 views0 comments
    The Digi-Disco, a 1970's Light Controller
    Dan Koellen AI6XG
    • Jan 25, 2021
    • 2 min

    The Digi-Disco, a 1970's Light Controller

    This is a light system that I designed and built in 1978 to control large flood lights of different colors, synchronized to disco music...
    73 views1 comment
    Wishing You a Very Random Christmas
    Dan Koellen AI6XG
    • Nov 23, 2020
    • 1 min

    Wishing You a Very Random Christmas

    Being the holiday season I decided to post this article from the December 2014 issue of Nuts & Volts magazine www.nutsvolts.com that I...
    48 views0 comments
    Big Font Clock Update:  Dimmer-Interface PCB and Setup Instructions.
    Dan Koellen AI6XG
    • Jun 29, 2020
    • 7 min

    Big Font Clock Update: Dimmer-Interface PCB and Setup Instructions.

    A prior post described the development and build of a clock to display time and date for UTC and Local. The clock characters are large,...
    143 views0 comments
    Dan Koellen AI6XG
    • Apr 5, 2020
    • 3 min

    Auto Run for your Raspberry Pi - how to have your Rpi boot up in the desired configuration.

    The Raspberry Pi (Rpi) is a great single board computer (SBC) that can be used in many projects and comes in different configurations. I...
    54 views0 comments
    Big Font Clock - Relieve for Old Eyes
    Dan Koellen AI6XG
    • Feb 9, 2020
    • 9 min

    Big Font Clock - Relieve for Old Eyes

    Recently the Maker Space that I frequent received a number of 4 line 40 character (4 x 40) LCD displays. They asked me to figure out how...
    414 views0 comments

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    • HOME

    • Electronics

      • Making and Hacking
      • Vintage Electronics
    • Ham Radio

    • SOTA

      • Antennas
      • W6 Activations
      • W7 Activations
    • ABOUT ME

    • More

      Use tab to navigate through the menu items.
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