LEDs

LEDs

LEDs

What is an LED?

An LED (light-emitting diode) is a an electrical component that emits light when current flows through it. Diodes are like one way valves for electricity and consist of semiconductor material which are ‘doped’ with impurity elements to change their chemical structure so that one half of the semiconductor material has a negative charge and the other has a positive charge. These regions are called the n- and the p-region respectably. We stock a variety of LEDs in different sizes and wavelengths to jazz up your project. We also sell RGB LEDs which can be programmed to give output different colours of light.

How does an LED work?

In the n-region of the semiconductor material there are negatively charged free electrons, while in the p-region there is an absence of an electron known as an ‘electron hole’ which is positively charged. When current flows through an LED, free electrons combine with the holes in the p-region to produce photons. LEDs convert electrical energy directly into light which is why they are much more efficient a greener option for lighting your project than incandescent light bulbs which convert electrical energy into heat into light.

led

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  • Infrared LED, 950nm Infrared LED, 950nm dimension

    Infrared LED, 950nm

    Sparkfun

    £0.90
    Infrared LED, 950nm This is a very simple, clear infrared LED. These devices operate between 940-950nm and work well for generic IR systems including remote control and touch-less object sensing. Pair them with any of our IR receivers. 1.5VDC forward...
    £0.90
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  • Infrared IR LED - 850nm, 5mm

    Infrared IR LED - 850nm, 5mm

    Sparkfun

    £0.85
    Infrared IR LED - 850nm, 5mm This is a very simple, clear infrared LED. These devices operate between 840-850nm and work well for generic IR systems including remote control and touch-less object sensing. Pair them with our IR receiver. This device has a...
    £0.85
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  • SparkFun COM-11679 LED - RGB 5mm Square (Piranha) main SparkFun COM-11679 LED - RGB 5mm Square (Piranha) 10p size comparison

    LED - RGB 5mm Square (Piranha) PPCOM-11679

    Sparkfun

    £1.50
    LED - RGB 5mm Square (Piranha) PPCOM-11679 Thanks to their square shape, these RGB LEDs can sit flush against a PCB saving you precious vertical space in projects where space is a luxury. They may not be huge, but these common cathode piranha LEDs are...
    £1.50
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  • LED - RGB Programmable, PTH, 5mm, Diffused (5 Pack) main LED - RGB Programmable, PTH, 5mm, Diffused (5 Pack)

    LED - RGB Programmable, PTH, 5mm, Diffused (5 Pack)

    Sparkfun

    £4.00
    LED - RGB Programmable, PTH, 5mm, Diffused (5 Pack) We know this looks like a lot of our other LEDs, but it’s just not the case!These beauties are Pin Through Hole Addressable RGB LED with a WS2812 control IC built right into the LED. This version...
    £4.00
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  • LED Green - 3W Aluminum Backed PCB (Pack of 5) 1 LED Green - 3W Aluminum Backed PCB (Pack of 5) 2

    LED Green - 3W Aluminum Backed PCB (Pack of 5)

    Sparkfun

    £7.75
    LED Green - 3W Aluminum Backed PCB (Pack of 5) So much power and light from such a miniature package. This 5 pack of green 3 Watt aluminum backed PCBs is sure to shed a lot of light on any project you add it to.These LEDs act as any other LED except...
    £7.75
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  • 5mm UV LED Clear

    5mm UV LED Clear

    Proto-PIC

    £0.60
    5mm UV LED ClearT hese 5mm UV LEDs are ideal for many lighting applications and products such as money checkers. The legs are on a standard 0.1" (2.54mm) spacing. Forward voltage drop: 3.4 V Viewing angle: 15 degrees Max forward current: 30...
    £0.60
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  • LED – RGB Programmable, PTH, 8mm, Diffused (5 Pack) main LED – RGB Programmable, PTH, 8mm, Diffused (5 Pack)

    LED RGB Programmable, PTH, 8mm, Diffused (5 Pack)

    Sparkfun

    £3.50
    LED – RGB Programmable, PTH, 8mm, Diffused (5 Pack) We know this looks like a lot of our other LEDs, but it’s just not the case!These beauties are Pin Through Hole Addressable RGB LED with a WS2812 control IC built right into the LED. This...
    £3.50
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  • RGB WS2812B SMD LED (Strip of 10) RGB WS2812B SMD LED (Strip of 10) 1

    WS2812B RGB SMD LED (Strip of 10)

    Proto-PIC

    £3.50
    WS2812B RGB SMD LED (Strip of 10) The WS2812B may look like a common 5050-sized (5x5mm) SMD LED, but there’s actually an integrated control circuit embedded inside there too. If you look really hard, you can see the tiny black chip hidden in there,...
    £3.50
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  • SparkFun COM-13105 LED - 3W Aluminum PCB (5 Pack, Cool White) main LED - 3W Aluminum PCB (5 Pack, Cool White)

    SparkFun COM-13105 LED - 3W Aluminum PCB (5 Pack, Cool White)

    Sparkfun

    £9.50
    SparkFun COM-13105 LED - 3W Aluminum PCB (5 Pack, Cool White) So much power and light from such a small package. This 5 pack of “Cool” white 3 Watt aluminum backed PCBs is sure to shed a lot of light on any project you add it to. These LEDs...
    £9.50
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  • WS2812B RGB Addressable LEDs 1000 per reel front WS2812B RGB Addressable LEDs 1000 per reel rear

    WS2812B RGB Addressable LEDs 1000 per reel

    Proto-PIC

    £180.00
    WS2812B RGB Addressable LEDs 1000 per reel This is a reel of 1000 addressable 5050 RGB LEDs commonly known by the name Neopixels.WS2812B_DatasheetFor quantity discounts please contact us, if out of stock the lead-time is usually 7-10 working days. 
    £180.00
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  • LED - 10mm Cycling RGB (fast)

    LED - 10mm Cycling RGB (Fast)

    Sparkfun

    £1.00
    LED - 10mm Cycling RGB (Fast) Want an LED that will flash and blink without the added work? These bright colour-changing LEDs only require a power supply and they will cycle through the RGB colourspace (red, green, and blue light added together in...
    £1.00
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  • LED Selection Kit 375pcs PP210091 main LED Selection Kit 375pcs PP210091 External view

    LED Selection Kit 375pcs - Proto-PIC Lab Tool Range

    Proto-PIC

    £7.00
    LED Selection Kit 375pcs - Proto-PIC Lab Tool Range A fabulous selection of our most popular LED range kitted together into a handy carry case, perfect for lab bench or tool kit.A selection of colours of both 3mm and 5mm flavours. All are 3V and 20mA...
    £7.00
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