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2. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared (IR) light. [7] Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red.

3. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   The materials used for the LED have a direct band gap with energies corresponding to near-infrared, visible, or near-ultraviolet light. LED development began with infrared and red devices made with gallium arsenide. Advances in materials science have enabled making devices with ever-shorter wavelengths, emitting light in a variety of colors.

4. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   The maximum continuous-on current is shown on LED datasheets, for example 20 mA (0.020 A) is common for most small LEDs. Many circuits operate LEDs at less than the specified maximum current to save power, or to reduce brightness, or to use a common resistor value. For indoor use, tiny surface mount high-efficiency LEDs can easily light up with ...

5. Opto-isolator - Wikipedia

   en.wikipedia.org/wiki/Opto-isolator

   Schematic diagram of an opto-isolator showing source of light (LED) on the left, dielectric barrier in the center, and sensor (phototransistor) on the right [note 1]. An opto-isolator (also called an optocoupler, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light. [1]

6. Infrared lamp - Wikipedia

   en.wikipedia.org/wiki/Infrared_lamp

   Remote controls and IrDA devices use infrared light-emitting diodes (LEDs) to emit infrared radiation which is focused by a plastic lens into a narrow beam. The beam is modulated, i.e. switched on and off, to encode the data. The receiver uses a silicon photodiode to convert the infrared radiation to an electric current. It responds only to the ...

7. Ravens suspend WR Diontae Johnson for 1 game after he refused ...

   www.aol.com/sports/ravens-suspending-wr-diontae...

   The Baltimore Ravens have suspended wide receiver Diontae Johnson for one game due to “conduct detrimental to the team,” the team announced Wednesday afternoon.

8. ‘Brain Rot’ is Oxford’s Word of the Year - AOL

   www.aol.com/entertainment/brain-rot-oxford-word...

   Credit - Denis Novikov—iStock/Getty Images. I f you’ve been scrolling too long on social media, you might be suffering from “brain rot,” the word of 2024, per the publisher of the Oxford ...

9. The 25 best last-minute gifts that will still arrive by Christmas

   www.aol.com/lifestyle/last-minute-christmas...

   Still shopping for Christmas gifts? Don't sweat it — we've rounded up 25 incredible options that will ship by December 25.