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2. Dell - Wikipedia

   en.wikipedia.org/wiki/Dell

   Dell is a subsidiary of Dell Technologies, Inc., a publicly traded company, as well as a component of the NASDAQ-100 and S&P 500. Dell is ranked 31st on the Fortune 500 list in 2022, [8] up from 76th in 2021. [9] It is also the sixth-largest company in Texas by total revenue, according to Fortune magazine.

3. Pulse-width modulation - Wikipedia

   en.wikipedia.org/wiki/Pulse-width_modulation

   When a digital signal spends more time in the on state than the off state, it has a duty cycle of >50%. When a digital signal spends more time in the off state than the on state, it has a duty cycle of <50%. Here is a pictorial that illustrates these three scenarios: History. The Corliss steam engine was patented in 1849. It used pulse-width ...

4. Computer fan control - Wikipedia

   en.wikipedia.org/wiki/Computer_fan_control

   The control signal is a square wave operating at 25 kHz, with the duty cycle determining the fan speed. 25 kHz is used to raise the sound of the signal above the range of human hearing; use of a lower frequency could produce an audible hum or whine. Typically a fan can be driven between about 30% and 100% of the rated fan speed, using a signal ...

5. OLED - Wikipedia

   en.wikipedia.org/wiki/OLED

   An organic light-emitting diode ( OLED ), also known as organic electroluminescent ( organic EL) diode, [1] [2] is a type of light-emitting diode (LED) in which the emissive electroluminescent layer is an organic compound film that emits light in response to an electric current. This organic layer is situated between two electrodes; typically ...

6. Video display controller - Wikipedia

   en.wikipedia.org/wiki/Video_display_controller

   A video display controller ( VDC ), also called a display engine or display interface, is an integrated circuit which is the main component in a video-signal generator, a device responsible for the production of a TV video signal in a computing or game system. Some VDCs also generate an audio signal, but that is not their main function.

7. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A tower type UPS with one IEC 60320 C14 input and three C13 outlets. A large data-center-scale UPS being installed by electricians. An uninterruptible power supply ( UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.

8. 25-pair color code - Wikipedia

   en.wikipedia.org/wiki/25-pair_color_code

   25-pair telco cable pinout. A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.

9. ECC memory - Wikipedia

   en.wikipedia.org/wiki/ECC_memory

   Early research attempted to minimize the area and delay overheads of ECC circuits. Hamming first demonstrated that SEC-DED codes were possible with one particular check matrix. Hsiao showed that an alternative matrix with odd weight columns provides SEC-DED capability with less hardware area and shorter delay than traditional Hamming SEC-DED codes.