Before USB ports became standard on PCs, several devices connected through a serial port. They're obsolete in many ways, but ...

It’s fast — at least as fast as the parallel port in the ancient laptops we have sitting around and plugs right into the CNC controller box for the Sherline. The software is where this really ...

Then he realized, why not make a simple printer port add-on that looks like a printer, but sends the data over USB as a serial stream? On the hardware side, the custom PCB (KiCAD project ...