| The "USB Magic Eye" circuit was presented back in 2010 as a handy CPU meter with a retro look. A USB port provided power and control, and a...
All items tagged with Circuits & Circuit Design and Tubes (5)
| Building a tube amplifier is a dream for many engineers and makers alike. But factors like the cost, large enclosure, transformers, and comp...
| The Basic Electronics book series (1959) helped spark Dr. Richard Honeycutt's fascination with tube circuits and transistors. Here he reflec...
| Although the theremin was invented nearly 100 years ago, the instrument still has enthusiastic fans. It is played entirely without physical...
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| Herwe use a green glowing valve as a CPU activity meter. Power and control are both provided by the USB port. A simpler variant on the circu...