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Tag Archives: indicator

How does vacuum cleaner clean/dirty indicator work?

In this video, Kerry Wong examines how the clean/dirty circuitry from a Hoover vacuum cleaner works. Details at Kerry D. Wong blog.  

Posted byDPNovember 2, 2016Posted inhow-toTags: comparator, indicator, op-ampLeave a comment on How does vacuum cleaner clean/dirty indicator work?

A homebrew Tayloe SWR indicator

TJ Campie wrote a post on his blog detailing his DIY SWR indicator/bridge build: Dan Tayloe, N7VE, developed a really neat resistive SWR bridge that uses a simple LED to identify the dip in SWR on an antenna.  QRPkits.com sells a nice kit of the bridge for just $15 and I recommend that if you don’t already have […]

Posted byDPSeptember 25, 2013September 25, 2013Posted inDIYTags: indicator, SWR1 Comment on A homebrew Tayloe SWR indicator
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