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How Do Those White LEDs Work

White LEDs, like other LEDs (Light Emitting Diodes), operate based on the principle of electroluminescence, where the emission of light occurs due to the movement of electrons within a semiconductor material. However, unlike traditional LEDs that emit light of a single color (such as red, green, or blue), white LEDs produce white light through a …

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How Can I Sense a Nearby Dark Object and Ignore More Highly Reflective Objects Further Away

Detecting nearby dark objects while ignoring more highly reflective objects further away requires a sensor system capable of distinguishing between different object characteristics such as color, reflectivity, and distance. Here’s how you can achieve this: 1.Use a Multispectral or Color Sensor: Utilize a sensor that can detect multiple wavelengths of light or colors. Dark objects …

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Should I Use Phototransistors or Photodiodes for Sensing

The choice between phototransistors and photodiodes for sensing depends on various factors, including the application requirements, sensitivity, speed, and cost considerations. Here are some key differences and considerations for each: 1.Phototransistors: (1)Amplification: Phototransistors provide built-in amplification, which means they offer higher sensitivity and can detect weaker light signals compared to photodiodes. This amplification can be …

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How Can I Create a Good Non-Reflective Black Surface

Creating a good non-reflective black surface can be achieved through various methods and materials. Here are several approaches you can consider: 1.Paint: Matte black paint with light-absorbing properties can provide a non-reflective surface. Look for paints specifically designed to minimize reflection and provide a deep black finish. Apply multiple thin coats to ensure even coverage …

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Who Makes the Highest Performance LEDs

Determining the manufacturer of the highest performance LEDs can be subjective and depends on various factors such as application requirements, specific performance metrics, and technological advancements. However, several LED manufacturers are renowned for producing high-performance LEDs known for their efficiency, brightness, reliability, and innovation. Here are some key players in the LED industry known for …

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How Do LEDs Fail

LEDs (Light Emitting Diodes) are known for their long lifespan and reliability compared to traditional light sources like incandescent or fluorescent bulbs. However, like any electronic component, LEDs can fail under certain conditions. Here are some common ways LEDs can fail: 1.Electrical Overstress (EOS): Excessive voltage or current can cause LEDs to fail. Overvoltage spikes, …

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Where Can I Find Really Powerful Green LEDs

Finding powerful green LEDs depends on your specific requirements for power, brightness, and application. Here are some places where you can find high-power green LEDs: 1.LED Manufacturers: Many LED manufacturers produce high-power LEDs in various colors, including green. Companies such as Cree, Lumileds, Osram, Nichia, and Seoul Semiconductor offer a range of high-power LED products. …

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How Does Ratiometric Range Measuring Work

Ratiometric range measuring, also known as ratio range finding or ratiometric distance sensing, is a technique used to measure distances or detect objects based on the ratio of reflected light intensities. This method is commonly employed in optical distance sensors, such as lidar (Light Detection and Ranging) systems, and works as follows: 1.Principle of Operation: …

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How Do Electronic Cameras Use IR to Measure the Distance to the Subject

Electronic cameras often use infrared (IR) technology, specifically Time-of-Flight (ToF) or Active IR methods, to measure the distance to the subject. Here’s how each method works: 1.Time-of-Flight (ToF): (1)Time-of-Flight cameras emit short bursts of infrared light pulses towards the subject. These pulses bounce off the subject and return to the camera’s sensor. By measuring the …

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