- published: 16 Jan 2012
- views: 108122
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.
An LED is often small in area (less than 1 mm2) and integrated optical components may be used to shape its radiation pattern.
Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics. The first visible-light LEDs were also of low intensity, and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.
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Here is a video to show how to prepare an SMD LED to put into a model kit.
I was sent these two lights to take apart and see if I could find what had gone wrong. They are 10W LED floodlights with a very slim profile due to the use of a large array of half watt SMD LEDs on a PCB with their mains power supply. If you like my videos you can support the channel with a dollar for coffee and cookies at https://www.patreon.com/bigclive
Specifications: 5730 SMD Led Brand Name: STAR Beam Angle(°):120° Average Life (hrs):40000 LED Chip Model:5730 Color:Warm White Number of LED Chip:1 pcs Voltage:3.0-3.6V 5050 SMD Led Brand Name: STAR Beam Angle(°):120° Average Life (hrs):40000 LED Chip Model:5050 Color: White Number of LED Chip:1 pcs Voltage:3.0-3.6V 3w COB Led Round 28mm Brand Name:STAR Beam Angle(°):120° Average Life (hrs):40000 LED Chip Model:3W High Power Color:White Number of LED Chip: 1 pcs Length: 28mm Base Type:led cob chip Voltage:9-12V If you use at 12v it will produce allot of HEAT. USE HEAT SINK! http://www.directdinchina.blogspot.ro
making smd led light project at home.you can use this project to remove darkness . i am using things which are available at your home.
A cheap and simple way to connect a 10W LED to a 12 volt supply. A current regulated LED driver keeps the LED at maximum brightness, while a heatsink and fan keeps it at a safe temperature. Total cost of parts, including the car cigar lighter plug and cable, is around £4. 2 Pin 50mm DC 12V VGA Card Cooler Heatsinks Cool Fan SY http://r.ebay.com/jVvnaY 5 X High Power 10W Warm White DC 9-11V LED Beads Lamp Bulb Chips 900-1000LM SMD http://r.ebay.com/BHbfHJ 1pcs Power Driver for 1x10w LED Light Lamp 950mA 12V MR16 http://www.ebay.com/itm/1pcs-Power-Driver-for-1x10w-LED-Light-Lamp-950mA-12V-MR16-/121080902070?roken=cUgayN&soutkn;=TotL42 12V 24V Male Car Cigarette Lighter Socket Plug Connector On Off Switch 1.5m DBX http://r.ebay.com/SLv2Op
Unboxing and Review 5M 5050 RGB 300 SMD LED Strip Lights with Controller. Test and Install Waterproof Led. Voltage 12 Dc. Colors Red Green Blue and mix. Farben der Lichterkette Rot Grün Blau und verschieden. Lieferumfang: Lichterkette Fernbedienung Steuerkasten Netzteilkabel und gebrauchsanleitung / Anleitung. Install.
Hand soldering Smd Smt lightboard Kit Build. To Make a 12v energy saving Solar Light Bulb His Lightboards For sale at http://mnev.weebly.com/ https://www.youtube.com/user/AlternativeDIYEnergy/videos more info check my website http://techlar.weebly.com/
In this video we demonstrate how to remove a surface mount smd/smt led and replace it.