KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Tuesday, September 15, 2020

Comparing the "KiwiSDR" and the "RaspberrySDR" software-defined receivers

Updates: The RaspberrySDR schematic and a fork of the source code is now available - see the addendum near the end of this article for comm...

Tuesday, July 7, 2020

An automatic transfer relay for UPS/Critical loads, for the ham shack, generator backup, and home

It is quite common to use a UPS (Uninterruptible Power Supply) to keep critical loads - typically computers or NAS (Network Attached Stora...

Thursday, July 2, 2020

What the heck happened to this Sense power monitoring module?

Figure 1: The exterior of this Sense SM3 power sensing module. The connections are made via barely-visible holes on the left side while ...

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