With the ability to wirelessly transmit data within a few inches, near field communication (NFC) has opened a new era of technology. The entire ecosystem fully supports applications ranging from contactless payment cards to authentication between mobile devices. This ecosystem includes chips such as NFC-enabled microcontrollers, standards for wireless transaction processing, and protocol stacks to handle various communication tasks.
Contactless payment cards can be used at 51,000 commercial network locations around the world. Devices such as smartphones and tablets with NFC can be compared to contactless payment cards. These devices can be used for various services, such as electronic ticketing, electronic coupons; security file sharing; access control in offices, homes, and cars. With the help of NFC technology and geographic target technology, when Google released the NFC wallet payment plan in San Francisco and New York last summer, it established partnerships with companies such as CiTI, First Data, MasterCard and Sprint.
At the same time, biometric passports also use contactless smart cards to enhance security. The so-called smart poster system uses different methods to develop location-based interactive advertising services.
For the latter system, users can slide the NFC-enabled mobile phone over the radio frequency tag (RFID) of the poster to view the advertisement. Then the mobile phone is connected to the appropriate back-end server through the mobile network. Based on the user and poster identification (ID) and other data, the server will send back information tailored to the user and physical location. Users can get guidance, learn about a certain product or service, get a coupon or make an appointment.
To protect security, components such as smart cards and security unit ICs provide hardware-based tamper-proof features, public key infrastructure (PKI) acceleration for authentication, and hardware encryption of communication channels and / or content Features. These features can meet the high-level EMV (Eruopay, MasterCard and Visa) security requirements. The range of supported software ranges from drivers, middleware to software development kits.
In addition to NFC hardware and software components, there is an ecosystem of mobile network vendors and transaction processing service providers. A trusted service manager (TSM) connects mobile network vendors, banks, service providers, and NFC mobile devices. Mobile network vendors such as Isis (a joint venture established by AT & T, T-Mobile and Verizon in North America) also provide TSM capabilities.
Near Field Communication (NFC) hardware architecture
Figure 1 shows a possible NFC design in a mobile phone. Contactless front end (CLF) such as Renesas RF21 near field communication controller mainly completes radio frequency connection and interface function with mobile phone application processor and user identity module (SIM) card.
Figure 1: On some occasions, mobile phones can use a contactless front end (CLF) to integrate NFC functions. This front end connects to the user identity module through a standard single wire protocol (SWP) interface. The next-generation integrated implementation can provide greater flexibility.
Multimedia speaker:
Multimedia Speaker is a kind of speaker unit which is used for multimedia devices. Multimedia Speakers are divided into tweeter, midrange, Woofer and full range according to their working frequency response ranges. Multimedia speakers have loud sound, wide frequency response range and rich bass. These speaker units are widely used in Bluetooth speakers, portable speakers, waterproof speakers, computer speakers, car audio , TV audio and robots
Our main multimedia speakers are full ranges speakers units:
1) From the diameter: we have speakers in 1" ~ 3".
2) From the power output, we have speakers of 2W ~ 15W.
FAQ
Q1. What
is the MOQ?
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 20 days for normal orders, 15 days for urgent orders.
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram.
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples.
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.
Multimedia Speakers
Multimedia Speaker,Multimedia Speaker Driver,Mini Speaker,Desktop Computer Speakers
Shenzhen Xuanda Electronics Co., Ltd. , https://www.xdecspeaker.com