Category Archives: Random

HP 6632B Upgrades

Posted on 2025-02-21 by Nigel VH

I recently picked up an old HP 6632B power supply to add to my electronics bench. It’s overall a nice supply, and is capable of two-quadrant operation so it’s useful for discharge testing batteries as well. Unfortunately, the unit I … Continue reading →

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Sound Insulated Rack Refresh

Posted on 2025-01-24 by Nigel VH

I keep my servers and networking gear in an enclosed, sound insulated rack in my garage. It keeps the noise down, makes it easy to duct the heat outside in the summer-time, and is a setup I’ve been quite happy … Continue reading →

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FlipDot Display

Posted on 2024-10-29 by Nigel VH

FlipDots are a very cool electromechanical display mechanism, and can offer significant power advantages, as they only consume power when changing state. These have been commonly used in roadside construction signs because they’re reliable, and can be easily powered from … Continue reading →

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Grid Frequency Measurement

Posted on 2024-07-16 by Nigel VH

Some recent conversations with a friend regarding instability of the power grid, and particularly the issues they are facing regularly down in California, got me interested in setting up some logging of the local grid frequency. Of course, there are … Continue reading →

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Customizing a Smart Plug – Part 2

Posted on 2024-01-18 by Nigel VH

In the first part of this endeavor, I opened up a some Wyze Plug Outdoor units, and reprogrammed the ESP32 inside with my own control code. These units have been working really well, and I wanted to add some of … Continue reading →

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