A diode is an electronic component that allows current to pass in one direction and blocks the current flow in the other direction. This phenomenon was discovered in 1874 by Ferdinand Braun at point contacts on lead sulfide. The term diode is usually applied for semiconductor diodes that operate with a P-N junction or a rectifying metal-semiconductor junction. In semiconductor technology, the term diode refers only to silicon diodes with a P-N junction, while other variants are identified by name with suffixes, for example Schottky diode or germanium diode. Diodes are used for rectification, the conversion of alternating voltage to direct voltage. In addition, the semiconductor junction has other useful properties which are exploited in Zener, photo and light-emitting diodes and semiconductor detectors. Diodes are the components, which are essential in the workshop of every electronics passionate and professional. In Botland store we have prepared a wide range of products, where everyone can find what they are looking for.
Sharp GP2Y0A02YK0F - Analog distance sensor 20-150 cm - Pololu 1137
Index: PLL-00073
- On sale!
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- Reduced price
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DFRobot qualMeter Basic - power supply/charger and USB cable tester
Index: DFR-10166
- Reduced price
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- On sale!
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Converter VGA - DVI-D 24 + 1 pin with cable 15cm - Akyga AK-AD-50
Index: RCO-14908
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- On sale!
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Diodes
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LED RGB 5mm matte common cathode - 5 pcs
LED RGB 5 mm with common cathode. Lens is matte with better light scattering. 5 pcs.
Index: UCC-01667
Index: UCC-01667
Index: LED-00543
Rectifier diode 1N4148 100V/0.15A - 10pcs
Rectifier diode, the maximum working voltage 100 V, current up to 150 mA. Price for 10 pieces.
Index: PAS-04927
Index: PAS-04927
Rectifier diode 1N4007 1A/1000V - 10pcs.
Rectifier diode, the maximum working voltage 1000 V, current to 1 And . Price for 10 pieces.
Index: PAS-01803
Index: PAS-01803
The set consists of 16 pieces of 5 mm LEDs: 5 yellow, red and green elements and 1 led in blue color.
Index: LED-04741
Index: LED-04741
- On sale!
Diode Schottky 1N5819 1A / 40V - 10 pieces
Schottky diode, maximum working voltage of 40 V, current up to 1 A. The set includes 10 pieces.
Index: PAS-00306
Index: PAS-00306
Index: LED-01448
- On sale!
Schottky diode 1N5822 3A / 40V - 10pcs.
Schottky diode, maximum operating voltage 40 V, current up to 3 A. Price for 10 pieces.
Index: PAS-00178
Index: PAS-00178
LED 5mm white cool clear - 5pcs
5mm cold white LED . Transparent lens. Price per 5 pieces .
Index: LED-03705
Index: LED-03705
Zener diode of 0,5 W and voltage of 3,3 V. Price for 10 pieces.
Index: PAS-04933
Index: PAS-04933
LED diode 5 mm, white. Transparent lens. Brightness: 8 000 mcd. Beam angle: 20 °. Price for 5 pieces.
Index: LED-00542
Index: LED-00542
Set of 5mm LEDs 10pcs with resistors
Set of ten 5 mm LEDS with resistors. The kit includes: 10 PCs resistors 1.2 kΩ and 3 PCs green, red and yellow LEDs and 1 blue LED.
Index: LED-04663
Index: LED-04663
LED 5mm white warm clear - 5pcs
LED diode 5 mm warm white. Transparent lens. Brightness: 14 000 mcd. Beam angle: 15 °. Price for 5 pieces.
Index: LED-00545
Index: LED-00545
Index: LED-11144
- On sale!
- Promotion
Zener diode 0,5W 5,1V - 10 pieces
Zener diode with power of 0.5 V and a voltage of 5.1 V. The set includes 10 pieces.
Index: PAS-04955
Index: PAS-04955
5mm 12V LED with resistor and wire - blue - 5pcs.
5mm blue LED with attached resistor and 18cm long cable. It is powered by 12 V DC.
Index: LED-04755
Index: LED-04755
LED 5mm blue clear 465-470nm - 5pcs
LED diode 5 mm blue. Transparent lens. Length the interaction of the wave: 465 - 470 nm. Brightness: 6000 mcd. Beam angle: 15 °. Price for 5 pieces.
Index: LED-00540
Index: LED-00540
LED 5mm 12V with resistor and wire - green - 5pcs
Led 5mm green with the included resistor and a wire length of 20 cm. It is supplied with the voltage of 12 V. Items are sold in sets of 5 pieces.
Index: LED-03159
Index: LED-03159
IR transmitter VSLB3940 3mm 940nm
Infrared transmitter in a 3 mm threaded housing. Emitted wavelength 940 nm.
Index: LED-00869
Index: LED-00869
Index: LED-04536
Power LED Star 3 W - white with heat sink
Power LED, cool white, with a capacity of 3 W with heatsink.
Index: LED-02497
Index: LED-02497
LED diode 5mm orange. Transparent lens. The length of the interacting waves: approx. 598 nm. Brightness: 5000 mcd. Beam angle: 15°. Price for 5 pieces.
Index: LED-00544
Index: LED-00544
Laser diode 5mW red 650nm 5V - module Iduino ST1172
Module with diode laser emitting light in red. Power equal to 5 MW. Voltage supply 5 V.
Index: MOD-08242
Index: MOD-08242
Historical Diode
The first device capable of letting electric current pass in one direction while blocking it in the other, was discovered in 1874 by Karl Ferdinand Braun with a galena crystal. At the beginning of the 20th century, copper oxide or selenium rectifiers were used to convert alternating current to direct current. This use applied through most of the century to charging batteries. In 1901, Peter Cooper Hewitt invented the mercury vapor rectifier, which was used for power applications until the 1970s. At the same time, seeking to improve the detection of radio waves, John Fleming developed the first electron tube (the vacuum diode), whose heated cathode emits electrons that the anode can pick up, while the opposite is not possible. The germanium or silicon semiconductor diode replaced vacuum tubes after World War II. The development of semiconductors has led to the creation of many varieties of diodes, exploiting the characteristics of the P-N junction, or, in the case of light-emitting diodes, the ancillary properties of the material.
Diode - the simplest semiconductor device
Despite its simple operation, the diode is a very useful component. Its primary function is to pass current in one direction only, while blocking it in the opposite direction. This phenomenon is called barrier polarization. Diodes are divided into different types, from the simplest to the most complicated devices. Advanced diodes work on the principle of non-linear current-voltage characteristics, which means that they can do more than just control the flow of current. It is also worth remembering that semiconductor diodes conduct electrical current when you exceed a threshold voltage in the direction of conductivity. Only temperature can affect the voltage drop of a diode, so this effect is used to measure it. In our offer we have prepared many diodes, which can meet the requirements of both professionals and amateurs. If in doubt, please contact our technical department, who will happily advise you on choosing the right product.
Different types of diodes
There are several types of diodes for different applications.
- Light-emitting Diode (LED) light: This is one of the most popular type of diodes. This diode allows the transfer of electric current between the electrodes which produces light. The color of the light depends on the band gap of the semiconductor.
- Avalanche Diode: This type of diode operates in reverse bias and applies avalanche effect for its operation. The avalanche diode is generally used for photodetection, where high levels of sensitivity can be achieved by the avalanche process.
- Laser Diode: This type of diode is different from the LED type because it produces coherent light. These diodes are used in DVD and CD players and laser pointers.
- Schottky Diodes: These diodes have lower forward voltage drop compared to ordinary silicon diodes with PN junction. The voltage drop can be somewhere between 0.15 and 0.4 volts at low currents, compared to 0.6 volts for a silicon diode.
- Zener Diode: This type of diode provides a stable reference voltage, therefore is very useful and in large quantities. The diode works in reverse bias and fails on the arrival of a certain voltage.