A PC’s serial port provides signal lines that you can use to expand the number of input signals. With some additional circuitry tied to these lines, you can use the port to test digital TTL ...

Have a test idea you'd like to share? Publish it here and receive $150. Send us your ideas. Read other Test Ideas. Read Design Ideas published by EDN. Engineers often need simple measurement circuits ...

The serial port provides even less power than the parallel port, and the voltage levels aren't regulated. With the aid of some additional circuitry, the serial port can power a micropower circuit, but ...

Ok, the title is a bit misleading. Like most things in life, it really isn’t infinite. But I’m going to show you how you can use a very interesting Linux feature to turn one serial port from a ...

If you've been using computers for more than a couple of decades, you've probably used a serial port to attach peripherals like your mouse and modem. Until the USB standard rendered them obsolete in ...

Yes, it is possible to get sound output from a serial port. Sure, it sounds terrible, but what did you expect. [markrages] ttyplay program first resamples the WAV file to the baud rate of the serial ...