For true reliability you’ll need to build directly in hardware, which is exactly what this map of the London tube system uses. The base map is printed directly on PCB, with LEDs along each of ...

If you keep up with various retro vacuum tube projects, you probably have run ... [David] walks us through the steps of making a sample PCB, introducing the various tools and procedures of his ...

He also registered a patent for this “Printed wire” technique. Paul Eisler, an Austrian engineer, made the first working PCB in 1943, replacing the large wiring of a radio tube. This PCB design ...

The tubes will hopefully enhance the ability of ... and subscribe to the city's daily beach flag alerts by texting "PCB Flags" to 888-777.