Category Archives: Electronics

K7NVH PoE PDU

Posted on 2017-09-16 by Nigel VH

A little while ago, I posted about using surface mount stencils for the first time on a new project. I’ve been able to get a couple of the units completed, and with some help from a friend with milling the … Continue reading →

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Cheap Wall Rack

Posted on 2017-09-16 by Nigel VH

After putting together the ESD protection bar for my PoE devices, I decided that I wanted to reduce the number of ethernet runs I had strung across the garage, so I took some scrap bits of lumber, and made a … Continue reading →

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2017 Balloons Launch

Posted on 2017-05-25 by Nigel VH

This year we had a bit larger class, so two strings were flown this year, in addition to some other groups flying experimental packages. The first flight reached approximately 105,000ft in altitude, and carried carried a number of student payloads, … Continue reading →

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Basic ESD Protection

Posted on 2017-05-25 by Nigel VH

A recent thunderstorm that came through the area reminded me that I needed to work on some improvements to my surge suppression systems. I have a number of outdoor ethernet devices like security cameras with rather long runs of cable … Continue reading →

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Binary Addition Machine

Posted on 2017-02-14 by Nigel VH

A few years ago, the idea came to me to build a binary addition machine as a display piece. The logic would be constructed of SPDT (Single Pole Double Throw) relays, which reduces the number of relays and simplifies the … Continue reading →

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