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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. Is there any alternative? The final goal is to build an intelligent cat door, that does not require adding a new RFID tag to my cat he already had one implanted, and doesn't wear a collar.

I got a reader dirt cheap from Priority1 Design. The electronics are exposed so I needed to make a custom case for it but it works great. Links below. As for my progress, I can currently detect the cats' tags as well as a test tag and locate the header in the data stream, working on the CRC and data payload formatting.

Are you sure it's a Companion animal tags in the US are commonly kHz. There are higher power readers that can read 12mm tags at much larger distances than what the Arduino and other simple readers can do. They cost a couple thousand dollars though. It has its own HVAC system. Sign up to join this community. The best answers are voted up and rise to the top.

Home Questions Tags Users Unanswered. Asked 8 years, 9 months ago.

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Active 3 years, 10 months ago. Viewed 41k times. Wookai Wookai 1 1 gold badge 3 3 silver badges 8 8 bronze badges. I edited my question to reflect this. If this does not work, I may look into another alternative though. Active Oldest Votes. Alin Kevin Kevin 26 1 1 bronze badge. Check out my tutorial if you want to build it from scratch for very cheap. I'll give it a try! Do you still have it around anywhere?

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I'm trying to figure out how to make a large diameter antenna to go around a cat flap. Here is a link to a cached page. I already have a khz reader, but I'd like to make a custom antenna coil for it with a 12inch 30cm diameter How did you calculate what you needed for your antenna? Unfortunately I don't have any way to see the wave form or anything like that. JYelton Dan Dan 31 2 2 bronze badges. Many kHz readers can be modified to read Warren Leach Warren Leach 19 1 1 bronze badge.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

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Latest commit. Git stats commits. Failed to load latest commit information. View code. About No description, website, or topics provided. Releases No releases published. Packages 0 No packages published. Contributors 5. You signed in with another tab or window. Reload to refresh your session.

You signed out in another tab or window. Accept Reject. Essential cookies We use essential cookies to perform essential website functions, e. Analytics cookies We use analytics cookies to understand how you use our websites so we can make them better, e. Save preferences.Description The EM previously named P chip is a CMOS integrated transceiver circuit intended for use in an RFID basestation to perform the following functions: antenna driving with carrier frequency AM modulation of the field for writable transponder AM demodulation of the antenna signal modulation induced by the transponder communicate with a microprocessor via simple interface.

Data transmission by Amplitude Modulation with externally adjustable modulation index using single ended driver Multiple transponder protocol compatibility Ex: EM, EM Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level. Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.

Please calculate ambient temperature range from max. Search Circuit. Section Supplier Datasheet.


Toggle navigation Digchip. Features, Applications Description The EM previously named P chip is a CMOS integrated transceiver circuit intended for use in an RFID basestation to perform the following functions: antenna driving with carrier frequency AM modulation of the field for writable transponder AM demodulation of the antenna signal modulation induced by the transponder communicate with a microprocessor via simple interface. Download EM Datasheet.A premium membership for higher-level suppliers.

Relevancy Transaction Level Response Rate. Supplier Types Trade Assurance. Supplier A premium membership for higher-level suppliers. Supplier Location. Order : OK. Ready to Ship. Brand Name Other.

Package Other. Contact Supplier.

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We are not responsible for any accidents, delays or other issues caused by the forwarder. We bear the shipping cost from return the part in guarantee day 3. If the items are defective, please notify us within 3 days of delivery. Any items must be returned in their original condition to qualify for a refund or replacement. Electronic Components EM Electronic Component EM Electronic components EM We are not responsible for any import fees or customs taxes.

We can offer a discount according to your purchase order quantity. We are looking forward to make business with you for a long time. Please contact us for a favorable quotation. Shipping We Ship to Worldwide Items will be shipped within 2 business day on payment received. If you have any questions, our Customer Service staffs welcome you to email or call us.

EM rfid module. Hot Selling. Integrated Circuits Alibaba best selling products ranking based on sales.


Updated daily. Top Search. About product and suppliers: em products are offered for sale by suppliers on Alibaba. A wide variety of em options are available to you, such as other. You can also choose from other, drive ic, and logic ics em, as well as from other em There are 86 suppliers who sells em on Alibaba.

Related Search: deactivate em strip suppliers eas book label suppliers em module suppliers book strip suppliers em original em em em em em ic em em em china em technology em em new original a em em china a one em china em china em oed china em1 china em original china em 1 china on ems china em export china em product in india china em com china metal ems china ems 50 led rgb 30 fox mould.Shown here is a typical configuration for reading and writing a kHz Tag. All rights reserved.

See UB to learn more. With only a few external components the EM can generate the kHz resonant magnetic field required for reading and writing of magnetically coupled RFID Transponders.

Direct antenna driving using bridge drivers. The antenna coil inductance L and capacitor Cres is a tuned circuit set to resonate at kHz. Transponder Tags have similarly tuned antenna circuits so as to maximize the power and signal transfer between the two. The EM will drive the antenna at its resonant frequency using its internal driver circuit.

This is a simple sine wave. As the coil is being driven at its resonant frequency the voltage at the junction of L and Cdv1 can be quite high. Typically of the order of 30V to V peak to peak, depending on the quality of the coil. The Interface to the EM is through 4 lines. The SHD pin controls the sleep mode of the device.

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For normal operation SHD is set Low. The Mod input selects between Read and Write operations. Typically this is not the actual bit data present within the Transponder. To complete your RFID reader design your digital processor will need to be a suitably fast microprocessor or other computing device in order to translate the encoded data that streams from the EM device, and to format the data in a more useful form.

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Further to that the digital processor can then take appropriate actions based on the data stored on the Transponder. RFID keytags.

RFID Proximity cards. RFID coils.Lesser known sports and second-division leagues are also subject to lower odds, but still attractive nonetheless.


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RFID Tag Reader (EM4102) with PIC16F690 and EM4095

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