Tuesday, April 13, 2010

Today's Macro Photo - electronics

Macro Photo Fun (Click photo to enlarge)  This is a power control switch on a PC. This symbol was officially named IEEE 1621 by the IEEE (Institute of Electrical and Electronics Engineers) on December 8, 2004. The IEEE definition is: “For use on a power switch or button if the off state is soft-off, is variable, is not known, or the distinction from hard-off is not important. Also for use with a power indicator, or as the icon for the power control panel.” The user interface for the power status control of electronic devices that ordinary people commonly interact with in their work and home lives, including, but not limited to, office equipment and consumer electronics. Key elements are terms, symbols, and indicators. It does not cover internal mechanisms nor interfaces for industrial devices.

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