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  2. Arduino Uno - Wikipedia

    en.wikipedia.org/wiki/Arduino_UNO

    LED: There is a built-in LED driven by digital pin 13. When the pin is high value, the LED is on, when the pin is low, it is off. VIN: The input voltage to the Arduino/Genuino board when it is using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin ...

  3. International Blinking Pattern Interpretation - Wikipedia

    en.wikipedia.org/wiki/International_Blinking...

    Fail (ODn.2) State Description 1: 0: Locate (identify) This state is used to identify a slot or drive 0: 1: Fail: This state indicates a slot with a failed drive 1: 1: Rebuild (preferred) Because of legacy and cross-compatibility with SGPIO initiators, both interpretations of rebuild should be supported 0 or 1: 1 Hz: Rebuild (supported) 0 or 1: ...

  4. LED circuit - Wikipedia

    en.wikipedia.org/wiki/LED_circuit

    In CC drivers, the voltage changes while the current stays the same. CC drivers are used when the electrical load of the LED circuit is either unknown or fluctuates, for example, a lighting circuit where a variable number of LED lamp fixtures may be installed. As an LED heats up, its voltage drop decreases (band gap decrease [1]). This can ...

  5. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    A single or a few LED junctions may be packed in one miniature device for use as an indicator or pilot lamp. An LED array may include controlling circuits within the same package, which may range from a simple resistor, blinking or color changing control, or an addressable controller for RGB devices. Higher-powered white-emitting devices will ...

  6. Arduino - Wikipedia

    en.wikipedia.org/wiki/Arduino

    Most Arduino boards contain a light-emitting diode (LED) and a current-limiting resistor connected between pin 13 and ground, which is a convenient feature for many tests and program functions. [76] A typical program used by beginners, akin to Hello, World! , is "blink", which repeatedly blinks the on-board LED integrated into the Arduino board.

  7. List of Arduino boards and compatible systems - Wikipedia

    en.wikipedia.org/wiki/List_of_Arduino_boards_and...

    Arduino 81.3 mm × 53.3 mm [ 3.2 in × 2.1 in ] USB FTDI FT232RL Improved: FT232BM has been replaced by FT232RL to require fewer external components, LED on pin 13 added Arduino NG plus ATmega168 [39] 16 MHz Arduino 81.3 mm × 53.3 mm [ 3.2 in × 2.1 in ] USB Arduino BT (Bluetooth) [54] ATmega168 [39] ATmega328 [33] 16 MHz Arduino

  8. Stack light - Wikipedia

    en.wikipedia.org/wiki/Stack_light

    Stack light in automated production for in-line quality inspection. Stack lights (also known as signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, or tower lights) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine's status to machine operators, technicians ...

  9. Charlieplexing - Wikipedia

    en.wikipedia.org/wiki/Charlieplexing

    A Charlieplexed digital clock which controls 90 LEDs with 10 pins of a PIC 16C54 microcontroller.. Charlieplexing (also known as tristate multiplexing, reduced pin-count LED multiplexing, complementary LED drive and crossplexing) is a technique for accessing a large number of LEDs, switches, micro-capacitors or other I/O entities, using relatively few tri-state logic wires from a microcontroller.