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2. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Simple LED circuit with resistor for current limiting. The current in an LED or other diodes rises exponentially with the applied voltage (see Shockley diode equation), so a small change in voltage can cause a large change in current. Current through the LED must be regulated by an external circuit such as a constant current source to prevent ...

3. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED. The voltage drop across a lit LED is approximately constant over a wide range of operating

4. Electronic test equipment - Wikipedia

   en.wikipedia.org/wiki/Electronic_test_equipment

   The following are used for stimulus of the circuit under test: Power supplies; Signal generator; Digital pattern generator; Pulse generator; Voltcraft M-3850 portable multimeter. The following analyze the response of the circuit under test: Oscilloscope (Displays voltage as it changes over time) Frequency counter (Measures frequency)

5. Texas Instruments SN76477 - Wikipedia

   en.wikipedia.org/wiki/Texas_Instruments_SN76477

   The following quotation summarizes its facilities: [T]he SN76477 generates complex audio signal waveforms by combining the outputs of a low frequency oscillator, variable frequency (voltage controlled) oscillator (VCO) and noise source, modulating the resulting composite signal with a selected envelope and, finally, adjusting the signal's attack and decay periods.

6. 15 Easy Appetizers You Can Make Ahead of Christmas Day - AOL

   www.aol.com/15-easy-appetizers-ahead-christmas...

   It's time for Nordstrom's Half-Yearly Sale: Stock up on beauty bestsellers from MAC, NARS and more. See all deals. In Other News. Entertainment. Entertainment. The Today Show.

7. Stand-alone power system - Wikipedia

   en.wikipedia.org/wiki/Stand-alone_power_system

   A stand-alone power system (SAPS or SPS), also known as remote area power supply (RAPS), is an off-the-grid electricity system for locations that are not fitted with an electricity distribution system. Typical SAPS include one or more methods of electricity generation, energy storage, and regulation.