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 ...
Monday, October 16, 2023

How to fabricate a 30W Power meter using 10dB Attenuator

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  While browsing the internet I came across a 100W/10dB attenuator resistor with a surprisingly low price. This sparked an idea in my mind -...
Monday, September 11, 2023

Advantech WISE-4220-S231 IoT Wireless Module

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Today, I will be sharing the advantages of using IoT devices such as the Advantech WISE-4220-S231 wireless sensor. The  WISE 4220 series is ...