One day customer asked: Is there are big different when using the factory cable come with LPS vs audiophile power cable?
The shop owner reply: There is a big different when you compared. The Respberry Pi 3 is really sensitive to the power cable, the better the shielding of the cable, the better the image and soundstage. This is normal apply to all audiophile gear. The shielding of the power cable plays a important role when designing the power cable.
The art of playing Raspberry Pi 3 is that, most customer experience the step up with each small upgrades. We have customer playing with switching power supply, upgrades with better Linear Power Supply, upgrade the power cable, DC cables upgrades, CAT 7 network cable upgrades, every small improvement counts to big step up.
The shop owner aims to provide more customerize made to measure service to all customers, for modification. We shares the product development process with most customers, when the product is right, we do more for everyone. That's why we sllightly changing the marketing approach on selling Raspberry Pi 3, selling is always by referral from friends, with ex-customers. AfterDark. Respberry Pi 3 is becoming the unique product as the shop owner always want to try something different. We tried and experiment with new products, all together become a series of classic. For example, AfterDark. Clementine Power Carbon fiber Shielding Cable 1.82M is one of our best selling product from last year.
The evolution product from AfterDark. is the based on Carbon Fiber Shielding (CFS) Technology. The shop owner will start a new sub product line called "Black Moderniza" for Project ClayX Products. The first product will be "made to measure" to enhance the performance and outlook on iFi AC iPurifier, the first production will be start next month on Feb 2018.
Carbon Fiber Shielding (CFS) Technology Vs EMI shielding performance Themoplastic Composites Fortunately, a new generation of carbon fiber composites is addressing the need for cost-effective, high-throughput parts. Beyond uses in automotive and consumer electronics, this new generation of composites is targeted at replacing metals in enclosures and EMI shields. Key features are the use of high-volume molding techniques and coatings to provide EMI shielding equivalent to metals. TE has been actively researching composite materials and improved methods of producing them in practical shapes. A typical thermoplastic composite begins with a high-performance engineered plastic to which fillers are added to enhance characteristics. For electronic enclosures, the plastic is likely to be a high-temperature moldable thermoplastic, such as grades of PPS, PEI, PEEK, or LCP. The actual thermoplastic is usually determined by a combination of required operating temperature and the fluid exposure likely to be seen. While glass fibers have been the most commonly used filler materials for adding structural strength, carbon fibers or other conductive fillers are required to produce materials with good EMI performance. Metal fillers are a possibility but are sometimes discounted because of the weight they add to the material. Carbon can be added in many forms: as carbon nanotubes (CNTs), graphene platelets, short or long carbon fibers, carbon microspheres, and simple carbon particles. Figure 2 summarizes the benefits of each. These filler materials make the plastic conductive to provide EMI shielding. The bulk resistivity of CNT-filled plastic can be less than 10 Ω-cm @ 5 to 10 percent filler volume and under 1 Ω-cm @ 50% percent volume. Additional conductivity can sometimes be obtained by metal coating the carbon-based fillers. The type of carbon selected will have significant effect on the strength of the resulting composite material. Long carbon fibers, for example, can be used to increase the strength and hardness of the material to equal or even surpass metal.
EMI Shielding Since any electronic system must work within its electromagnetic environment, control of EMI is critical. Shielding is a critical part of EMI control. EMI protection is a two-way street. A system must control its own generation of EMI so that it does not interfere with other systems. At the same time, the system must be protected from interference from outside sources. Shielding works both to contain internally generated noise and to protect against outside interference.
Metal enclosures offer excellent shielding. Noncomposite plastic enclosures are transparent to EMI. Composite enclosures can be designed with varying levels of shielding effectiveness. Users must not only determine the degree of shielding required, but also the frequencies that must be dealt with. Shielding effectiveness varies with frequency. A metal enclosure provides EMI protection mainly by reflecting energy. This is an advantage when the unwanted energy comes from outside the enclosure. When EMI is radiated by the electronics within the enclosure, energy can be reflected back into the electronics instead of being eliminated. Composite enclosures, on the other hand, provide a combination of reflection and absorption.
Carbon-fiber fillers exhibit significantly less conductivity than metal. Similar to metal, these materials will conduct EMI. However, their less efficient conductivity means EMI is absorbed and dissipated as heat rather than being conducted to ground. Enclosures can achieve better shielding effectiveness by either making the fillers more conductive (i.e., more metal-like) or by adding a layer of metal to the enclosure
