matapan

Does anyone know anything on the ATX PC motherboard that can be used for state checking to determine if the PC is on or not, using an IOLinc? This is my first project using a device like this - the momentary contact part is pretty straightforward, but the state determination isn't as easy as I thought it would be. At first, I thought all you had to do was to measure the voltage across some circuit for the presence of +5 or +12V DC. Apparently, this isn't what the IOLinc inputs work off of. One has to look for something else, the presence of a "closed" circuit (how is that different from looking for 0V or 5V?). This is the part I'm a bit fuzzy on. Anyone with more electrical experience than I (probably most people!) care to take a shot at this? I'd be much obliged!

Turning a PC on using Insteon and the ISY may be useful if you are using a PC as a media hub. Imagine setting up a Keypadlinc button as a macro for turning on a PC, which boots without a login screen and runs your favorite media application (e.g. iTunes and Airtunes, in my case). This is probably straightforward to implement. In looking at the way the switch on an ATX computer case works, it looks like an Insteon-compatible I/O controller like EZIO2X4 or the IOLinc can be used as a means to close the momentary contact circuit signalling the PC power supply to turn itself on. The ISY program mapped to the Keypadlinc button could also used to turn on an audio component and set it up in the correct mode for the playback of audio from the computer.