Category Archives: Electronics

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 →

Posted in Electronics, Random | Leave a comment

Numitron Clock

Posted on 2025-01-10 by Nigel VH

After watching a recent Technology Connections video about Numitron tubes, I was inspired to pick some up to add to my dragon’s hoard of junk. A quick visit to eBay later, and a few less dollars in my bank account, … Continue reading →

Posted in Art, Electronics, Projects | Leave a comment

Homebrew OOB & Stratum 1 Reprise

Posted on 2024-12-07 by Nigel VH

A few years ago I posted about a homebrew box I made containing a cell modem, a GPS receiver, and a couple of Raspberry Pi SBCs to handle Out-of-Band access to my gear at the datacenter where I only have … Continue reading →

Posted in Electronics, Technology | Leave a comment

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 →

Posted in Electronics, Games, Random | Leave a comment

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 →