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 ...

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I built a 133mhz machine out of spare parts for satellite emulation, problem is that there is only 1 serial port on the board.<P>So i went to the store and bought a 25pin serial card with 9pin adapter ...

You may have noticed your TV has a port marked RS-232 on the back that doesn't look like any other connector you have. Here's what it's for.

The device shown in Figure 17-1 is an RS-232–to–TTL converter board, designed to allow a PC with a serial (RS-232) port to communicate with a device that has a console (TTL) port. External converters ...

A computer’s serial port is a convenient source of low-speed dc control signals that are easy to set from software. For example, the RTS (request-to-send) line outputs about +9 V when “on” and -9 V ...