스마트폰 스티커로 결제. 비접촉 결제 아이콘입니다. NFC 아이콘입니다. 무선 결제. 비접촉 현금 지불. 격리 된 배경에 벡터입니다. EPS 10.에 대한 이 프리미엄 벡터를 다운로드하시고, 15백만 개 이상의 전문 그래픽 자료를 확인하세요
No, you still cannot accomplish anything mind-blowing with those, unless you are an extreme technological enthusiast and automate the whole house like Billy G. But you can make tiny aspects of ...
What can you do with NFC tags? There are some useful and creative ideas to open your eyes…
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There is still a lot of education that needs to be done around Near Field Communication, commonly known as NFC. Businesses have an idea of the technology existing, but how they can use it and for…
Primary color: Background Secondary color: Instagram logo color Wouldn’t you want potential followers to easily pull up your Instagram account? Our minimalist-designed NFC Tap Here Decals will allow anyone with a compatible smartphone to easily find your account. You can use this for yourself or make it a personalized gift for friends and family! How to use: -Place decal on window or any non-magnetic flat surface. NFC tag is to be placed inside window behind the decal or directly under the decal. -Hold the phone approximately 0.5" away from the decal -Click the pop-up notification on your phone screen *Order of 1 comes with 1 Instagram decal and 1 programmed NFC tag.* NOTES: *Product compatible with most smartphones.* *Made for flat, smooth, non metallic surfaces* *Phone cases or magnets on the phone may block signal from NFC Tag* Size: 2.7"x2.7" Please contact us for any questions, comments, concerns, or special requests!
Follow these easy tips to protect the security of your devices, your data, your internet traffic, and your identity.
Are you wondering how to use NFC on your iPhone? This technology will help you share data and make payments with just a simple touch. This guide will show you how to use NFC on your iPhone! What is NFC? NFC stands for Near Field Communication. This technology allows two…
NFC mal anders: Die Muse Blocks von Senic speichern Links zu digitaler Musik oder Smarthome-Szenen. Der Abruf klappt mit jedem aktuellen Smartphone.
1. Display: 1.36 inch AMOLED2. Resolution: 390*3903. Waterproof grade: IP684. Sensor: SC7A205. Memory: 128M6. Bluetooth version: 5.07. Battery capacity: 500mah8. Compatible system: support IOS 9.0 and above, Android 4.4 and above9. Functions: reject calls, answer calls, view call records, music control, sleep monitoring, heart rate monitoring, blood oxygen monitoring, multi-sport mode, NFC function, Alipay offline payment, AI smart voice, call reminder, message reminder, remote control Taking pictures, sedentary reminders, etc.10. Dial size: 45x11mm11. Wrist circumference: 260mm
NFC stands for near-field Communication. Today, NFC is applicable to almost everything, including business cards. Unlike traditional business cards, custom NFC business cards have revolutionized…
Learn the essentials of NFC tag stickers and how they can simplify your life. Explore their uses for mobile payments, automation, and more in this guide.
I recently watched a cross-country running race that used a digital timing system, so I investigated how the RFID timing chip works. Each runner wears a race bib like the one below. The bib has two RFID tags, consisting of a metal foil antenna connected to a tiny RFID (radio-frequency identification) chip. At the finish line, runners pass over a pad that reads the chip and records the finish time. (I'm not sure why there are two RFID tags on each bib; perhaps for reliability of detection.) This race bib has two RFID chips and antennas for timing the race. The RFID chips are tiny black specks in the small loop of each antenna. The die photo below shows the RFID chip used on these tags. To create it, I took 22 photos of the chip with my metallurgical microscope and stitched them together to create a high resolution photo. (Click the image for a larger version.) To prepare the chip, I removed it from the plastic carrier with Goof Off, dissolved the antenna with pool acid (HCl), and burnt off the mounting adhesive over a stove. This process left the chip visible with just a bit of debris that wouldn't come off. I'd probably get better results with boiling sulfuric acid, but that's too hazardous for me. I described the image stitching process in this article. Die photo of the Impinj Monza R6 RFID chip. The chip turns out to be the Monza R6 RFID chip built by Impinj, a leading RFID chip company. The chip datasheet includes a die photo of the chip (below), but it is mostly obscured for some reason. Even so, it is clear that the chip in the datasheet matches the one I photographed. Die photo of the Monza R6 RFID chip from the datasheet. Most of the chip is obscured; the antenna contacts are visible at the top. How RFID timing works The basic idea of RFID timing is the finish line has an RFID reader connected to a directional antenna. When the runner crosses the finish line, the reader communicates with the RFID chip on the runner's tag, determines the runner's ID number, and records the elapsed time. You might expect that the RFID chip simply returns the runner's number as the runner crosses the finish line, but there's a complex two-way protocol at work here. The chip uses the industry-standard EPC standard, and supports about a dozen commands: Select, Query, Read, Write, Lock, and various others. (While some RFID chips include cryptography, the R6 does not.) The chip receives commands from the reader and responds according to the protocol. The chip's memory includes an Electronic Product Code (EPC), which is a 96-bit universal identifier. In this case, the EPC value is returned to identify the runner. One interesting thing is the RFID chip has no power source other than the radio signal; it is passive and doesn't need a battery. The reader transmits a radio signal (between 860 and 960 MHz), which is picked up by the antenna on the tag. The tiny amount of power received by the tag is what powers the RFID chip. To send data to the RFID chip, the reader pulses the radio signal it emits. The chip detects these pulses and converts them into bits, using various modulation schemes (details). You might expect the chip transmits a radio signal to send data back to the reader, but it doesn't have enough power to do that. Instead, the chip dynamically changes load on the antenna (basically a transistor shorts out the antenna) while the reader is sending the radio signal. This causes a tiny change in the signal strength at the reader (about 1 part in 1000), which the reader can detect. This process, called backscatter, allows the chip to send data back to the reader without using power. You might wonder how the system works if two runners cross the finish line at the same time—how do both tags get read without interference? RFID tags are designed for inventory systems, so they are designed to handle environments where there are hundreds of tags in range of the reader. They use an efficient anti-collision protocol. The reader can minimize collisions by querying a subset of tags at a time ("I only want to hear from tags whose ids start with 123.") By rapidly iterating through subsets, a large number of tags can be queried with minimal conflicts. Collisions are handled using a protocol called the Q-algorithm. Essentially, each tag waits a random amount before responding, so hopefully there won't be a collision. If there is a collision, tags wait a longer random amount next time until they can respond without collisions. This is based on the ALOHA protocol, which was also used to handle collisions on Ethernet networks. Inside the chip Below is another die photo. I took this one earlier in the cleaning process, so there is more debris on the chip surface. The colors are slightly different in this photo due to different microscope camera settings. Die photo of the Monza R6 RFID chip. Because the chip is complex and has multiple layers of metal, I was unable to analyze its circuitry in detail. However, I can make some informed speculation about it. The top part of the chip is the analog circuitry, extracting power from the antenna, reading the transmitted signal, and modulating the return signal. The two antenna contacts are the large gold pads at the top (on the left and right). The rectangles between the antenna contacts are probably transistors and capacitors forming a charge pump to extract power from the radio signal (see patent). The voltage received from the radio signal is about 200 millivolts, while the chip's circuitry requires about 1 volt. The charge pump boosts the incoming voltage to the higher voltage required. The middle of the chip has the logic circuitry. Given the complex protocol that the chip handles, you might expect a microprocessor to control the chip. But it uses a complex state machine instead, presumably to keep the chip small and reduce power consumption. This is probably build from CMOS standard digital logic cells, connected by the visible wiring (horizontal lines). This logic includes a pseudo-random number generator to support the anti-collision algorithm. The chip has the label "IMPINJ KELSO". It's unclear why it is labeled "KELSO" and not "R6". I couldn't find any references to a "kelso" chip, so this could be an internal name. The Impinj company is in Seattle, Washington and Kelso is a small city in Washington, so perhaps that's the connection. The bottom third of the chip likely contains the storage. The black rectangles above and below the IMPINJ KELSO text are probably the 12 bytes of non-volatile memory (NVM) that hold the tag identification. (This is essentially flash memory.) This Impinj patent discusses the NVM system. Writing the memory requires about 12 volts, which is provided by another charge pump. The gold squares scattered across the chip are probably test points used to program the chip and verify proper operation during manufacturing. These chips are really small Let me emphasize how tiny the RFID chips are—they are specks, about the size of a grain of salt. According to the datasheet, the chip is 464.1µm x 400µm (about 1/64 inch on a side). This is much smaller than a typical IC, and explains why the RFID chip doesn't break if the tag is flexed. The biggest problem I had with the die photos was making sure I didn't lose the chip. If I brushed against the chip it could stick to my finger and vanish until I carefully searched my hands to find it. The image below shows the Monza 4, a similar but slightly larger RFID chip, on top of a penny, next to a grain of salt. (A couple months ago, I wrote about the Monza 4 chip and how it is times the Bay to Breakers race.) The RFID chip used to identify runners is very small, about the size of one of the letters on a penny. A grain of salt (next to R) and the RFID chip (on top of U). This chip has four antenna contacts. The antenna Closeup of the RFID antenna and chip. The chip is the black speck in the center above DogBone, below the + sign. The two halves of the antenna are seemingly shorted together, but that's an important part of the RF impedance matching. The antenna seems straightforward at first—two metal strips connected to the chip. But if you look more closely, you'll notice that the strips are joined together above the chip, which would short out the signal. How does this work? The short answer is it's RF magic. The longer answer is the antenna is carefully designed to match impedance between the transmitter and the chip, so as much power as possible is received by the chip. The central part of the antenna is the "loop" and the two long parts of the antenna are the "dipole". The loop doesn't short out the dipole, but instead they work together. The area of the loop acts as an antenna, and the dipole provides the appropriate impedance so the system resonates at the right frequency. The "dogbone" antenna shape isn't artistic but helps fit a longer dipole into the available area. RFID antennas are explained in more detail in this application note. The tag (combining the antenna and chip) is produced by Smartrac (whose name is barely visible under the black text), and sells for about 13 cents. The RFID system is similar in some ways to the NFC (near-field communication) that smart phones use for tap-and-pay. The following infographic summarizes the differences (full size). This infographic is courtesy of atlasRFIDstore. Conclusion The RFID chips used for race timing are very small but include a lot more complexity than you'd expect. I took some die photos of the Monza R6 chip that show the analog and digital circuitry crammed into a piece of silicon the size of a grain of salt. The chip manages to power itself off the radio signal, allowing it to operate without a battery. This circuitry supports a complex communication protocol between the RFID tag and the reader. The foil antenna is carefully designed to maximize power transfer to the chip. All this is combined into a tag that sells for under 13 cents. I announce my latest blog posts on Twitter, so follow me at kenshirriff.
NFC is more than just a gimmick! Learn how to use NFC and do a lot of cool stuff with it.
NeoFinity claims to launch India's first NFC sticker which is NCMC compatible and powered by a RuPay platinum virtual prepaid card
Enter the E-Ink Cover, a revolutionary accessory that redefines the norms of smartphone personalization. With its advanced e-ink screen technology, it offers a fresh avenue for making your iPhone distinctively yours, ensuring it stands out as a mirror of your unique identity. Showcase Your Style Leave bland cases behind The E-Ink Case lets your phone reflect your individuality. From celebrities to to-do lists, mottos, logos, or pet photos, personalize endlessly. Each design transforms your case into a unique talking point. NFC Technology The E Ink Case, an energy-saving and eco-friendly phone case, uses NFC to wirelessly transmit data for screen projection. No batteries or cables are needed, it enables a customizable dual-screen experience directly on your phone case. Durable and Sleek Design •Hybrid Material: Crafted from premium PC and TPU, featuring a carbon fiber texture for an enhanced feel and anti-fingerprint properties. •Ultra-Slim Profile: Maintains the phone's original aesthetics without adding bulk, providing a non-slippery and secure grip. •Perfect Covered: All of your phone’s buttons, and switches made of textured metal features and functions work flawlessly, and convenient open access to ports and speakers. How to Use •Place your phone into the e ink case to automatically connect via NFC. •Use the QR code on the package or search for the "Ink Show" app to download. •Freely create texts and images within the app and showcase them on your cover's screen. Once your design is displayed, your E-Ink Cover is all set. Specifications: •Screen Size: 3.7 inches •Screen Resolution: 240(H) x 416(V) px •Color: 3-color display
With obscure acronyms and overlapping functionality, RFID and NFC are easy to confuse. Here we dive into the similarities and differences between the two, and highlight specific use-cases where each technology excels.
