Trusted Name In Electronics Components

Beiträge vom March, 2011

Twinkling LED

Thursday, 31. March 2011 4:01

Twinkling LED Christmas lights are a great way to add some animation to your holiday lighting display. Our twinkle Christmas light sets feature steady burn warm white LED Christmas lights mixed in with warm white twinkling bulbs that softly twinkle in and out for a warm holiday effect.Bright, colorful, festive motif lighting is perfect for decorating windows and walls.
high quality,cheapest price
low power consumption,long life span
color rich,effect good and stable
Indoor decoration lighting.
large scale backlight.
Window display lighting.
Building contour decorative lighting.

Thema: Leds | Kommentare (0) | Autor:

Rigid PCBs

Wednesday, 30. March 2011 4:11

Rigid PCBs are the backbone of electronic devices. Advancement in rigid circuit board technology has broadened the applications on electronic products ranging from computers, communication devices and consumer electronics to automotive and medical electronics.Rigid PCBs are available in a wide variety spanning from simple single-sided boards to highly integrated multilayer substrates with blind and buried vias. An even higher degree of integration can be achieved by using the PVA-technology-a combination of copper filled vias with sequential build up also know as stacked vias. It is also possible to realize copper filled vias directly in the pad (via in pad) rendering substantial higher packing densities and better assembly yields.

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flexible PCB

Tuesday, 29. March 2011 3:51

flexible PCB is a printed circuit produced on a flexible substrate, allowing it to be folded or bent to fit the available space or allow relative movement. Edge connectors are commonly provided, for interfacing to other components.The introduction and growth of the flexible printed circuit with several layers has increased the ability of manufacturers of complex electronics products to reduce end product size. Several layer flexible printed circuits combine the advantages of high-density rigid printed circuit boards with the physical attributes of Flexible PCBs. They are gaining in popularity, although they have not yet reached the performance of the Rigid Multilayer PCB alternatives. As flexible layers increase, the Flexible option loses much of its flexibility, and thus, much of their advantage over rigid boards. Although used in different applications due to different performance or physical requirements, rigid and flexible printed circuits have much in common. Many of the advantages of high-layer count printed circuit boards hold true for their flexible counterparts that have several layers. Some shared advantages include high reliability, uniform and accurate wiring, and excellent compatibility with automated machines for easy wiring, component attachment and soldering.

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About multilayer PCBs

Monday, 28. March 2011 3:25

A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or signal traces etched from copper sheets laminated onto a non-conductive substrate. It is also referred to as printed wiring board (PWB) or etched wiring board.PCBs are commonly used in computer devices such as motherboards, network interface cards, and RAM chips. They are relatively cheap and quite fast. When the PCB is fabricated with several layers placed over one another, it is known as a multilayer PCB. The multiple layers establish a reliable set of predetermined interconnections for the electronic circuits.Multilayer PCBs were developed during the 1970s and by the mid 1980s multilayer boards accounted for the majority of PCBs manufactured in the USA. At first four to eight layers were possible but boards can now be mass-produced with as many as forty-eight layers. At the present time,the advances in wiring techniques and flexibility of connections used in modern PCBs have improved the performance of a range of products, especially automated and complex devices such as computers and cellular phones.

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Hook Switch

Friday, 25. March 2011 3:31

The hookswitch was identified as on and off switch for most operations of a telephone. The hookswitch consisted of seven metallic leaves, a notched fiber board, spring and an insulated base which was, as one unit semi-permanently mounted with rivets to the base of the telephone instrument. Eavesdroppers could easily modify the hookswitch so that it could pass audio from the handset down the telephone line even though the handset was setting on the instrument’s cradle. Electronic hook switches are more commonly used in high volume telephone and DAA products because they offer lower cost than relays, consume less power, and are smaller. However, electronic hook switches are constructed from high voltage transistors and have difficulties being driven from integrated circuits fabricated in low voltage processes. One difficulty is that the control current available on a DAA integrated circuit (IC) is very low. Another difficulty is that often at least one transistor is required to high voltage level shift control outside of the operating voltage range of the controlling circuit. Collectively, level shifting and cascading of transistors to get sufficient current gain typically require the use of at least 3 high voltage, bipolar transistors.

Thema: Switches | Kommentare (0) | Autor:

Slide switches

Thursday, 24. March 2011 1:39

Slide switches are mechanical switches defined by their method of activation. The switch is a slider that moves (slides) from position to position. Slide switches are known for providing selection of two or more switch positions for engagement of respective switch contacts. Electrical slide switches have long been used to control the operation of many devices, including volume and other controls for audio & video equipment, dimmer controls for lights among a multitude of other daily electrical products. Such slide switches have also been used for controlling the operating speed of many kinds of variable speed hand tools. In electrical slide switches a slide member is slidably repositionable to affect a switching action. Slide switch operation can occur in conjunction with pushbutton operation to provide momentary pushbutton switch actuation in each of the slide switch positions. Slide actuated switches come in a variety of forms. A commonly used slide switch has a strip of conductor material mounted on a slider and fixed contacts connected to terminals of the switch mounted in a body. Movement of the slider relative to the body moves the strip of conductor material into and out of contact with the fixed contacts to provide a switching action. Another type of slide actuated switch relies upon the slider movement causing a pivoting movement of a conductor member from one to the other of two extreme positions.

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CD10-Axial Aluminum Electrolytic capacitors 85C

Wednesday, 23. March 2011 2:57

CD10-Axial Aluminum Electrolytic capacitors 85C
Load life of 2000 Hours at 85C
Axial lead type
For General consumer electronics products application
Ideal for inconsistent polarity circuits and Car Radio
Product Feature
Rated voltage range: 6.3 to 100V
Capacitance tolerance (20 degrees Celsius, 120Hz): ±20%(M)
Capacitance range: 0.1 to 4,700μF
After minute application of rated voltage: I≤0.003CV + 3μA
Dissipation factor(WV): (v) 6.3 to 10, 16 to 25, 35, 50, 63 and 100
Tan (maximum): 0.24, 0.20, 0.16, 0.14, 0.12 and 0.10
Capacitance change: ≤20% of the initial value
Dissipation factor: ≤200% of the specified value
Leakage current: ≤ the specified value
Capacitance change: ≤20% of the initial value
Dissipation factor: ≤150% of the specified value
Load life 2,000 hours at 85 degrees Celsius
Suitable for use in circuits whose polarity is sometimes reversed or unknown
Case size larger than 5mm diameter has safety vents
Operating temperature range: -40 to +85 and -25 to +85 degrees Celsius

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About fuses

Tuesday, 22. March 2011 2:29

A fuse consists of a metal strip or wire fuse element, of small cross-section compared to the circuit conductors, mounted between a pair of electrical terminals, and (usually) enclosed by a non-conducting and non-combustible housing. The fuse is arranged in series to carry all the current passing through the protected circuit. The resistance of the element generates heat due to the current flow. The size and construction of the element is (empirically) determined so that the heat produced for a normal current does not cause the element to attain a high temperature. If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit.Fuses come in a vast array of sizes and styles to serve in many applications, manufactured in standardised package layouts to make them easily interchangeable. Fuse bodies may be made of ceramic, glass, plastic, fiberglass, molded mica laminates, or molded compressed fibre depending on application and voltage class.While glass fuses have the advantage of a fuse element visible for inspection purposes, they have a low breaking capacity which generally restricts them to applications of 15 A or less at 250 VAC. Ceramic fuses have the advantage of a higher breaking capacity, facilitating their use in circuits with higher current and voltage. Filling a fuse body with sand provides additional cooling of the arc and increases the breaking capacity of the fuse. Medium-voltage fuses may have liquid-filled envelopes to assist in the extinguishing of the arc. Some types of distribution switchgear use fuse links immersed in the oil that fills the equipment.

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Axial electrolytic capacitors

Friday, 18. March 2011 1:14

Electrolytic capacitors are electronic components that store electric charge. What distinguishes them from other types of capacitors is the manner in which they store that charge. Electrolytic capacitors make use of an electrolyte, a liquid or jelly-like substance with a high level of electric conductance, in order to store electricity.Axial electrolytic capacitor is one type o electrolytic capacitor,they are so named for the manner in which the capacitors leads – the wires which run in and out of the capacitor — are situated on the component. Most capacitors are shaped like tiny barrels with two wires running out of them. In axial electrolytic capacitors, the leads are located on the opposite ends of the capacitor. Axial electrolytic capacitors are large in size and usually lay horizontally on circuit boards.

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Push button switch

Thursday, 17. March 2011 2:35

A push button switch is used to either close or open an electrical circuit depending on the application. Push button switches are used in various applications such as industrial equipment control handles, outdoor controls, mobile communication terminals, and medical equipment, and etc. Push button switches generally include a push button disposed within a housing. The push button may be depressed to cause movement of the push button relative to the housing for directly or indirectly changing the state of an electrical contact to open or close the contact. Also included in a pushbutton switch may be an actuator, driver, or plunger of some type that is situated within a switch housing having at least two contacts in communication with an electrical circuit within which the switch is incorporated.

Thema: Switches | Kommentare (0) | Autor: