Just like a PC’s USB port, the serial port on a PC can also in some cases serve as a power supply. A USB port can provide as much as 500 mA at 5V, but a serial port provides less power. Even with the ...

Sometimes it’s nice when you can do everything you need to do with just one single port. In this vein, [Nicola Strappazzon] ...

This application note describes the operation of a general- purpose, microcontroller-based Serial Port Interface (SPI) boot circuit. This is a low cost solution for users who need to modify some of ...

So I'm trying to detect through Visual Basic 6.0 when a voltage change occurs on one of the pins of the serial/parallel port. The whole thing is pretty simple; no data transfer/handshaking/etc needs ...

Okay, I was thinking last night about a possible mod, and have some questions.<BR><BR>My idea was to use an old VU meter or analog voltage meter as a processor usage meter to put on the front bezel of ...