du1vss (D.I.Y.)

It's all about ham radio. Although some of my projects involved transmitters, rf amplifiers and antennas that operate outside the ham bands, these things are solely for educational purpose only and experimentation.

Wednesday, September 3, 2025

Asked ChatGPT to describe me in one picture.

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Fair enough..... de du1vss

Tuesday, September 2, 2025

How to Build an Automatic Station Identification using Arduino and DF Player

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One of my recent weekend project is the automatic station identifier using Arduino Nano, DFPlayer and DS1307 RTC module. These three modu...

Sunday, August 10, 2025

How to build a programmable Buck Converter XY6020L

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Another find from the Chinese market is this XY6020L DIY programmable buck converter. I bought mine from Lazada for about 21 USD and the ...

Tuesday, July 8, 2025

Programming my Arduino Industrial Board

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I 'm excited to start testing my newly acquired Arduino Industrial 101 board for potential R&D in Internet of Things (IOT) applica...

Thursday, September 12, 2024

Antenna Analyzer Impedance Calculations

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I just found this valuable information on the mathematics behind the modern antenna analyzer. The diagram was part of the May 2005 issue of ...

Friday, August 9, 2024

How to repair defective Met One MSO Weather Sensor board

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We have three defective MSO weather sensors from Met One Instruments that have been sitting in the junk box for over 7 years. Upon checkin...

Tuesday, July 9, 2024

Measuring the Impedance of a UHF Quadloop

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Quad loop antenna is indeed has a 100ohms impedance at the feed point. I tried to build a UHF version of the quad and sweep its frequency ...

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About Me

hevirred: Hello, I'm Vir, a ham radio operator with a callsign of DU1VSS from the Philippines.. I hope you find this blog useful and interesting. Feel free to send me an email if you have questions about my projects. Thank you and 73. hevirred@gmail.com

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