13 Watt Led SAVING Bulb - Replaces 100Watt	From 12,00 USD	Order Now!!!
	7 Watt Led SAVING Bulb - Replaces 65Watt	From 10,95 USD	Order Now!!!
	7 Watt Led SAVING Spotlight - Replaces 65Watt	From 16,00 USD	Order Now!!!
	Dimmable Led SAVING Bulb -  Replaces 65-75Watt	From 18,00 USD	Order Now!!!
	Dimmable Led SAVING Bulb- Replaces 100-120Watt	From 21,50 USD	Order Now!!!
	Dimmable Led SAVING Coloured Bulb- Replaces 100-120Watt	From 28,00 USD	Order Now!!!
	Flourescent LED SAVING Replacement Led Tube - 120 cm.	From 14,00 USD	Order Now!!!
	Elegant Desk Led SAVING Lamp - Assorted Colours	From 16,00 USD	Order Now!!!

We invite you to surf through our web to find all you need about led lights.UPDATED LIST OF MOST POPULAR LED PRODUCTS ON THE WEB:

LED SAVING3mm ultra bright,LED SAVING 3mm ultra bright diffuse, LED SAVING4.8mm ultra bright strawhead,LED SAVING 5mm ultra bright, LED 5mm ultra bright 12V, LED 5mm ultra bright diffuse, LED 5mm radial beam, LED 5mm flashing ultra bright, LED 10mm 4-Chip-HighPower, LED 10mm 4-Chip-HP diffuse, LED 10mm 4-Chip-HP 12V, LED Rainbow / RGB, Superflux LED ultra bright. Superflux 3-Chip HighPower, Superflux 4-Chip HighPower, OSRAM Power LEDs, Cree Power LEDs, Luxeon Power LEDs, Prolight Power LEDs, WINGER Power LEDs, Power LED Accessoires, SMD LED 0603 series,SMD LED 0805 series, SMD LED 1206 series, SMD LED series PLCC2, LED Light Bars / Stripes, LED Wallwasher, RGB LED Technology Aluminium LED SAVINGTrack System, LED Power Controller, Constant Current Sources,LED Spots,HighPower P4/XR-E LED spots, LED Downlights, LED Accessories, Resistors - SMD 1206, Resistors - 0.25W-1W, Resistors - 2W-5W, LED Flashlights, LED SAVINGCar Bulbs - NEW, Soldering and Co.,LED Decoration, LED SAVING Specials We have an extensive list od suppliers of leds in China

www.ledfromchina.com and other Far East Countries, looking for distributors and final clients in Europe and America. Avoiding intermediation, we can all get better prices, by cutting costs and time of service.We have a technical department to advise on the implementation and use of our products in their application and, if necessary, design new lighting devices so as to suit their requirements.

H. E. Wimperis, head of Scientific and Industrial Research of the Ministry, called Dr. Robert Watson Watt, a physicist and director of the Radio Research Laboratory and asked about the prospect of developing a death ray. Watson Watt returned to his laboratory and proposed that Dr. Arnold Wilkins, a physicist and his assistant: calculate the amount of RF power required to raise the temperature of 4 liters of water at 35.5 º C to 41 º C at a distance of 5 km and a height of 1 kilometer. His calculation showed that the power needed to generate a huge it was clear that was not feasible death ray through the radio.
Wilkins told Watson that the engineers of the Post Office had become aware of a disturbance in the reception of very high frequencies when a plane was flying in the vicinity of their receptors. This observation (January 1935) gave rise to a series of events that culminated in the invention of radar.
Experimental verification was initiated, which was given to Wilkins, who with their rudimentary equipment could detect and take the path he had followed a plane. The primary outcome was resolved visual presentation of information received, used a cathode ray tube. He made many changes so that it could detect both the distance it was a plane, but also its height. Most of the system was complete in September 1938 when the Munich crisis occurred.
They settled in the British aircraft electronic devices receiving the broadcast wave sent from earth to turn a special identifying signal as friends. In August 1939, three weeks before the start of World War II, Britain had a system for detecting aircraft. Using radar, the British could detect the departure of the German planes from its bases in conquered countries, including France and Belgium.
1.6-integration chips, computers ... The transistor was first used in the late 1940s, at the time was considered a marvel of compactness, compared with the size of vacuum tubes. Since 1950 the size of electronic devices has been reduced. In 1960, he began using the word microelectronics, a block (chip) of silicon from an area of 0.5 cm ² could contain 10 to 20 transistors with various diodes, resistors and capacitors.
Today these blocks can contain several tens of thousands of components. As the micro-electronics was developed, applied to business computers. He designed different portable devices as calculators. Each component that was used in an electronic circuit was made of materials that had the characteristics required for its operation. We used tungsten cathode of a vacuum tube, ceramic capacitors, resistors coal.
By the mid-1950s were built electronic circuits in industrial laboratories in two U.S. companies, Texas Instruments and Fairchild Semiconductor. This would have built a number of microelectronic devices and systems that distinguish the time in which we live hand clocks, robots, and other microcomputers.
1.7-Development of electronics in the world. In computing, configurable hardware, the computers optical and molecular computing. In computers optical beams replace the connections metal (copper). These will be of greater capacity, faster, lower power consumption and occupy less space.
In land transport, flying MAGLEV trains (Magnetically Levitated Vehicles), electric cars and electronics, and intelligent car technologies are responsible for the rapid and secure movement of people. The trains are flying vehicles that run at speeds approaching 500 km / h. Powerful electromagnets are used to generate forces suspension, steering, traction and braking of the train. The Japanese train HSST with repulsive magnetic suspension, and the German Transrapid magnetic suspension attractive are two prototype MAGLEV which in practice have shown that speeds of 500 km / h are possible.
In electric cars, combustion engines are replaced by electric motors powered by rechargeable batteries. These electric cars are more efficient (in terms of energy / distance) and cleaner (do not emit pollutants) that vehicles with combustion engines. These arise as a necessary response to environmental pollution and depletion of world oil reserves.

THE 7 SEGMENT LED DISPLAY

One of the most popular applications of LED's is the signal. Perhaps the most used is the 7 LED's placed in a figure eight as shown in Figure 9. Although outwardly form differs considerably from a typical LED, internally consist of a series of LEDs with a certain internal connections. Figure 9 shows the wiring diagram of the connections within a 7-segment LED. Figure 9. 7 segment display. On the left are two possible ways to build the circuit Figure 9 shows a seven-segment display. It contains seven rectangular LED (a - g), in which each segment is called because it is part of the symbol is showing. With a seven-segment display can form the digits 0 to 9, also the letters a, c, eyfy lowercase letters b and d. Coaches often use microprocessors seven-segment indicators to display all the digits 0 through 9 plus a, b, d, d, e and f. Polarizing the various diodes, will light the relevant segments. This way we can signal all numbers in base 10. For example, if we represent the number 1 in the display we will send signal to the diodes b and b, and the other diodes must have zero voltage. This can be written as 0110000 (0). The first digit represents the diode, the second to b, the third to c, and so on. A zero represents not to polarize the diode, ie we do not apply tension. A one represents the diode is polarized, and therefore emits light. Often eighth segment appears in brackets in the example above, which functions as a decimal point (Figure 10).

Eighth segment features Durability: excellent viewing angle: 150 degrees per digit consumption: 50 mW average life hours: 100000 Brightness: Good Ease of Assembly: excellent general Vcc: 1.5 volt. The Vcc depends on the color of the LED. For red: Vcc = 1.7volt. More = 2 volt Vcc. Depending on the voltage applied to obtain an intensity. It is advisable not to exceed the recommended Vcc. When Vcc reaches the maximum segment may be destroyed.
PROTECTION. Each segment (and the point) is a LED as any. Because of this the average current to be applied is 15 mA. Depending on the logic that we are using we should use a resistance for each entry so you do not force the device: Logic TTL (5 volt): 220 Logic CMOS (12 volt): 680 This resistance must be placed on each pin, being a bridge between excitation logic signal and display.

DEVELOPMENT OF PRACTICE LED DISPLAY

Circuit to implement the circuit and adjust the voltage source controlled by the value indicated in Figure 1.p. Lcl displays: IR1 = 2.2 m Amperes. Edit the value of the current flowing through the 1k resistor R1. Lcl displays: R2 = 2 m Amp. Measure the value of the current flowing through the 1k resistor R2. Display cabinets: R3 = 0.2 m Amperes. Measure the value of the current flowing through resistor R3 10k. Display cabinets: VR1 = 2.94 volts. Measure the value of the voltage drop resistance R1 1k. Display cabinets: VR2 = 2.67 volts. Measure the value of the voltage drop 1k resistor R2. In display: VR3 = 2.67 volts. Measure the value of the voltage drop 1k resistor R3. In display: VD1 = 0.7 volts. Measure the amount of voltage the diode D1. In display: VD2 = 0.7 volts. Measure the value of voltage of diode D2. Glass display: ID1 = 2.2 m Amperes. Measure the current value of the diode D1. Glass display: ID2 = 2.2 m Amperes. Measuring the heat of the D2 diode current. Perform mathematical calculations for the network of Figure 1.py determine the voltage drop across each resistor, the currents I, I1 and I2, the power in the diode D1 and D2 and complete the circuit. -6 + 0.7 +0.7 + VR = 0 VR = VR = 4.6 volts 6-0.7-0.7 VR3 = VR2 = 2.18 volt. LVK -6 + 0.7 + 0.7 + 1.9 = 0 1.9 IT IT IT = 4.6 m = 2.42 Amps. I = IT = 2.42 m Amperes. I1 = 2.42volt2.2 m Amperes. I2 = 0.22 m 2.42volt Amps. PD1 = VD1 ID1 = (0.7volt) (2.42 mA) = 1.7 m Watts PD1 PD2 = VD2 ID2 = (0.7volt) (2.42 mA) PD2 = 1.7 m = VT IT PT Watts = (6volt) (2.42 mA) = PT 14.52 m Watts

In the electronic circuit of Figure 1.P, making what is listed below: Circuit to implement. Implement the circuit and adjust the voltage source controlled by the value indicated in Figure 2.p. Glass display: IR1 = 0.2 m Amperes. Measure the value of the current passing through the resistor R1 10k. Display rack: R2 = 0.1 m Amperes. Measure the value of the current flowing through the 1k resistor R2. Display rack: R3 = 0.1 m Amperes. Measure the value of the current flowing through the 1k resistor R3. Display rack: IR4 = 0.2 m Amperios.Medir the value of the current passing through the resistance R4 20k. Screen monitor stand shelf at graphic stands with acrylic fixtures of 7 Segments: VR1 = 2.82 volts. Assessing the value of the voltage drop resistance R1 10k. Screen monitor stand shelf at graphic stands with acrylic fixtures of 7 Segments: VR2 = 0.13 volts. Measure the value of the voltage drop 1k resistor R2. : VR3 = 0.15 volts. Measure the value of the voltage drop 1k resistor R3. Screen monitor stand shelf at graphic stands with acrylic fixtures of 7 Segments: VR4 = 5.70 volts. Measure the value of the voltage drop of the resistance R4 20k. Screen monitor stand shelf at graphic stands with acrylic fixtures of 7 Segments: VD1 = 0.55 volts.

Assessing the value of diode voltage at D1 Screen monitor stand with shelf stands graphic acrylic fixtures of 7 Segments: VD2 = 0.53 volts. Measure the value of voltage of diode D2 and store fixtures for retail and lcd hd brochure and showcases 44,780 for energy saving lamps and LED bulbs: ITOTAL = 0.2 m Amperes. What is the total current value of the circuit? The currents in the two diodes are the same as the breakdown voltage is 0.7 volts both also the resistance in series with each of the diodes are of the same denomination. What happens to the current through the diodes D1 and D2? Perform mathematical calculations for the network of Figure 2.py determine the voltage drop across each resistor, currents passing through diodes D1 and D2 and total circuit meshes: mesh I I1 -9 + 10 + 1 (I1 - I2) + 0.7 + 20 0 31 I1 = I1 - I2 = 8.3 (1) mesh 2 -0.7 + (I2 - I1) + 0.7 + 2 = 0 2 I2 - I1 = 0 (2) I1 I2 = 0.27 m Amps VR1 Amps = 0.13 m = (0.27mA) (10k) = 2.7 Volts VR2 = (0.14mA) (1k) = 0.13 Volts VR3 = (0.27-0.13) (1k) = 0.14 Volts VR4 = (0.27mA) (20k) = 5.4 Volt ID2 = R3 = 0.14 m Amps ID1 = IR1 - IR3 = 0.27-0.14 = 0.13 m Amp I TOTAL = IR1 = 0.27 m Amperes.

In the electronic circuit of Figure 2.p, make what is listed below: circuit to implement. Implement the circuit and adjust the voltage source controlled by the value indicated in Figure 3.p. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: IR1 = 0.7 m Amperes. Measure the value of the current flowing through the 1k resistor R1. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: R2 = 0.1 m Amperes. Measure the value of the current passing through resistor R2 2k. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: R3 = 0.7 m Amperes. Measure the value of the current flowing through resistor R3 10k. Retail Screen monitor stand shelf at graphic stands with acrylic fixtures of 7 Segmentsand store fixtures for lcd and hd 44,780 brochure and showcases for energy saving lamps and LED bulbs: VR1 = 0.76 volts. Measure the value of the voltage drop resistance R1 1k. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: VR2 = 0.27 volts. Measure the value of the voltage drop of the resistance R2 2k. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: VR3 = 7.6 volts. Measure the value of the voltage drop of the resistance R3 of 10k. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: VD1 = 0.63Voltios. Measure the amount of voltage the diode D1. Retail store fixtures and lcd and hd 44,780 for brochure and showcases for energy saving lamps and LED bulbs: VD2 = 0.27Voltios.

Measure the value of voltage of diode D2. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: ID1 = 0.7 m Amperes. Measure the current value of the diode D1. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: ID2 = 0.6 m Amperes. Measuring the heat of the D2 diode current. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: ITOTAL m = 0.7 Amps. What is the value of the total power consumption of the circuit? Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: m Ptotal = 6.51 Amps. What is the value of the total power consumption of the circuit? Perform mathematical calculations for the network of Figure 3.py determine the voltage drop across each resistor, the currents I, I1 and I2 and power diodes D1 and D2 and total circuit meshes: Mesh 1 -9 + I1 +0.7 + 2 (I1 - I2) + 10 0 13 I1 = I1 - 2 2 = 8.3 (1) Mesh 2 2 (I1 - I2) + 0.3 = 0-2I1 + 2 2 = - 0.3 (2) I1 = Amp 2 = 0.73 m 0.57 m 0.73 m Amp Amp IR1 = IR2 = 0.73-0.57 = 0.16 m = 0.73 m IR3 Amp Amp VR1 = (0.73mA) (1k) = 0.73 Volts VR2 = (0.16mA) (2k) = 0.32 Volt VR3 = (0.73mA) (10k) = 7.3 Volts IR1 ID1 = ID2 = 0.73 m = 0.57 m Amp Amps.

In the electronic circuit of  a led display.

Figure 3.P, making what is listed below: Implement the circuit and adjust the voltage source controlled by the value indicated in the figure 4.p. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: IR1 = 2.7 m Amperes. Measure the value of the current flowing through the 1k resistor R1. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: R2 = 2.7 m Amperes. Measure the value of the current passing through resistor R2 2k. Outdoor chandelier and headlight with fluorescent lanterns of low voltage for plasma and lcd tv: VR1 = 2.7 volts. Measure the value of the voltage drop resistance R1 1K.Medir the current value of the diode D3. Answer: all flowing through the diode D3. What happens with the current through the diodes D2 and D3? Answer: As D2 leads only from the 0.7 volts and D3 forces him to work at 0.36, then D2 is not conducive. What happens to the diode D2? Answer: ITOTAL = 2.7m Amps. What is the total current value of the circuit? Answer: Ptotal = 25m Watts. What is the value of the total power of the circuit? Perform mathematical calculations for the network of Figure 4.py determine the voltage drop across each resistor, the currents I, I2 and I3 and power in the diode D1, D2 and D3 and complete the circuit. In the electronic circuit of Figure 4.p, then make what follows: the diode D2 D3 opens because it does work at 0.3 volts so no driving.

Research findings. Through research we could understand the operation of a light emitting diode (LED). That's practically an ordinary diode, but with certain variations in their manufacture, which means that when the diode is connected directly, the excess energy of moving electrons is released as light. The 7-segment display is widely used in electronic applications to display data to the user. But despite their usefulness has certain limitations that have led to development of other displays that can consist of more than 8 LED's. Practical conclusions. Laboratory practices can be observed that the behavior of a diode in real life differs somewhat from the theoretical behavior. Specifically, they differ in the breakdown voltage, this varied from one circuit to another, in some cases the silicon diode was beginning to lead to a voltage as low as 0.55 volts. On the other hand, the germanium diode, whose theoretical breakdown voltage is 0.3 Volts, reached a working voltage of 0.36 volts without burning.

When two diodes of the same type (eg, silicon) are placed in parallel, working both at the same voltage without any problem and the current is divided equally in both directions unless they are placed with different resistance value. When put to work in parallel with two diodes of different types (Silicon-Germanium), the dominant voltage is the diode with lower breakdown voltage, which in this case was the Germanium diode (0.3 volts), which means that the another diode (Silicon), which requires 0.7 volts to start work, will not because it limits the germanium diode. Liquid Crystal Display (LCD) The LCD's are different from other types of displays that do not generate light but work with the reflection of light. The operating principle is simple. These liquid crystals are formed by molecules elongated cigar-shaped, called nematic molecules and align with a symmetrical structure. In this state the material is transparent. An electric field causes the molecules to be misaligned so as to become opaque to light. Thus, applying or not applying an electric field (ie, polarized or not polarized), we can play with darkness or transparency respectively. If we apply the field geometries locally equal to 7-segment display, get a display similar to the LED's but with liquid crystal.

In the construction of an LCD transparent electrodes deposited on the inner face of the crystals, as shown in Figure i). These electrodes have the desired geometry, for example, 7-segment display. The thickness of the liquid crystal is very small, the order of 0.01mm. If the terminals are not polarized, the influence of light on the front glass, passes through the liquid crystal and is reflected by the mirror shining on the eye that is watching. The result: everything looks light in color. If polarize an electrode, eg electrode, the electrode attached to the liquid crystal becomes opaque, black, dark. The light is not reflected. Figure I). Schematic construction of a LCD. There are different types of "displays" as the use for which they were designed. The most basic is the display with 7 segments, designed to represent numbers ranging from 0 to 9 as we saw earlier. With this type of light can also represent some letters, but these are sometimes capital letters (like A), and other sensitive (such as the d bo). Still, it is impossible to generate some characters as the Y or X, among others. To solve these problems have been designed between different types of "displays" called alphanumeric. There are two basic types. Numeric and alphanumeric LEDs. a) Appearance of a "display" 7-segment numeric. b) Table of characters and numbers can be represented in the display with 7 segments. c) Appearance of a "display" 16-segment alphanumeric. d) Idem. a "display" String of 35 points. e) Table of characters and numbers can be represented in the display with 16 segments the 16 segments, which shows the schematic of Figure ii-c, and 35 points in Figure ii-d. The first is very similar to the seven segments, but sixteen segments used to represent a greater number of characters and, in this case, also special signs as shown in Figure ii-e. The second, as shown in Figure ii-d, is, in fact, an array of dots arranged in seven rows of five points for each row. Logically thinking, the ability to make symbols or characters is far superior to the "display" of 16 segments. .

Led Display Manufacturer