Invention of SD Card

Invention of SD Card Invention of SD Card-In 1999, SanDisk, Matsushita, and Toshiba agreed to develop and market the Secure Digital (SD) Memory Card. The card was derived from the MultiMediaCard (MMC) and provided digital rights management based on the Secure Digital Music Initiative (SDMI) standard and for the time, a high memory density.  SanDisk Corporation (NASDAQ: SNDK), a global leader …

Read More »

How does High Pressure Sodium lamp works?

How does High Pressure Sodium lamp works? How does High Pressure Sodium lamp works? High-pressure sodium lamps are quite efficient—about 100 lm/W—when measured for photopic lighting conditions. The higher power versions of 600 W have an efficiency of 150 lm/W. They have been widely used for outdoor area lighting such as streetlights and security. Understanding …

Read More »

How USB Ports Work

How USB Ports Work How USB Ports Work Just about any computer that you buy today comes with one or more Universal Serial Bus connectors. These USB connectors let you attach mice, printers and other accessories to your computer quickly and easily. The operating system supports USB as well, so the installation of the device drivers is quick and …

Read More »