Questions tagged [smart-card]

Smartcards go from memory-chips to ARM 32-bit architecture microprocessors on board. There used in a variety of industries from Telecoms(sim cards) to banking(EMV).

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64 views

Stm32 SmartCard Reader with 3 slots

Trying to implement smart card reader with 3 slots on stm32f072. The reader for one card works quite well, but as soon as I try to add two more slots - there are problems. Knowing that CCID supports ...
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stm32f072rbt6 PCSC SmartCardReader with multiple slots

I use the CCID driver for STM32F072RB, converted to the Hal library. There was a need to make a multi-slot Smart Card Reader (specifically - there will be 3 slots for smart card). In the process, I ...
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158 views

Connect STM32F4 with smart card ISO7816

everybody. My task is to connect STM32F4 discovery Board with Smart Card ISO7816. I don't use interface ST8024CDR only hooked paid directly by the scheme specified in the image: I tried to adapt the ...
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Shielding a visa paywave card [closed]

I live in Melbourne Australia, and I know that if you had two myki's close together they prevent each other from working causing a "multiple cards detected" message to appear. I was wondering if this ...
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What is this weird EMV pin on my credit card?

I recently got a Venmo card, which is my first card with contactless support. I was looking at the EMV pins and noticed a very weird design. In the middle of the ground pin there is this long, thin ...
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1answer
80 views

Some sort of Sim card in Fax machine

I took apart our old Fax machine. And I found some weird Sim Card (See size compared to a regular sim card). I wonder what such a card is doing in a fax machine. Also I'm wondering what else I could ...
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96 views

Does STM32CubeMX assist in creating STM32L0 firmware for communication with smartcards?

I need to create STM32L0 firmware for communication with a smartcard (ISO 7816). I will use Tx pin from USART2. Is STM32CubeMX helpful for setting smartcard related stuff?
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156 views

smart card clocking using NXP

In my current project, I'm trying to implement a smart card reader using LPC1788 which has a built-in smart card interface. Smart cards use the ISO7816-3 standard to communicate with the outside world....
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1answer
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Power consumption of TDA8029 USIM controller for 3V/5V cards

we are using TDA8029 in one of our application board. Just a summary of the circuit. TDA8029 in our board connects a USIM card and reads the data and sends on UART. In our board, 2 supply inputs of ...
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1answer
837 views

Is this possible to transmit higher data-rate with 9600 bdrate clock in ISO7816

I am trying to transceive information between an embedded processor and a smart-card device. Default transition is done in: 9600 baudRate 3.58MHz clock pulse Fi=372 Di=1 After initial command ...
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Why would a wireless smart card antenna have one larger loop and three smaller loops instead of four similar size loops?

This image is originally from here. I added some annotations. The picture shows an x-ray shot of a smart card with wireless capability (and also a contact pad for direct connection to a terminal). ...
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How does concentric antenna wire cross the antenna in a wireless card?

Here's a typical layout of a wireless smart card. I simplified it as far as I could. The black filled rectangle is the chip. The black lines are wires comprising the typical concentric antenna layout. ...
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777 views

Smart Card (SIM) clocking requirements

I'm trying to implement a SIM card interface using TI TM4C123XL. I have a question about a clock. TI MCU seems to provide possibility to interface smart cards but don't let me multiply clock without ...
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1answer
156 views

Does merging the chip and the contact pad in a chip-and-pin card make the whole module less reliable?

This picture is from here (A and B letters are irrelevant for this question). A chip-and-pin card like Visa Electron has a ...
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2answers
273 views

Why does smart card antenna follow a “snake” pattern when approaching the chip?

This image is from this post which shows MasterCard plastic card being dissolved in acetone to have the circuitry extracted for further analysis (TL;DR further analysis failed because of chip ...
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What is the difference between ISO/IEC 14443 and ISO 7816 smart cards

I am trying to build my own smart card decoder and I found that the smart card with the most popularity in terms of security and utility is the Mifare Desfire EV1 which is pretty much industrial grade....
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292 views

Understanding a debit card reader through RFID

I work in the bus industry and today I went to a meeting that gave me an idea for a project. In order to start the project, I need to gather a technical perspective of how the product that I saw in ...
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Why is processing power and memory in smartcards so limited? [closed]

Why is it that common smartcards like the SLE5528 are almost always limited to <16K of available memory, and a very slow 8 bit processor? What is the limiting factor that makes it technologically/...
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610 views

Is it possible to protect smart card from being copied?

I'm currently working on SLE4442 smart card. I'm trying to make a payment system. but the card has to be "copy-protected" what I mean here is that if that data on the card is copied as it's, this data ...
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Why is outer turn of this smart card antenna wider than the other turns?

Here's a scan of a stripped MIFARE Ultralight smart card. Most of the wiring is the antenna which effectively consists of a single spiral track. The outer spiral turn clearly is a bit wider than the ...
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1answer
154 views

Smart Card Reader IC interface

I am trying to implement Smart Card Reader( MFRC523 Reader) using Controller LPC2138 interface. Link for datasheet: http://www.nxp.com/documents/data_sheet/MFRC523.pdf I have interfaced MFRC523 ...
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Design of an electronic device to disable remote access ability of contactless payment cards without visible alterations and damage to the card

Question: How could I build an electronic device which disabled the remote interaction functionality of contactless payment cards while not affecting the functions which are accessed via the on-card ...
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750 views

smart card pin out

Following is the image of the smart card which I am using. Can I get the pin configuration? And what kind of memory IC can we fit inside this card. How to find inside IC?
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Delayed VCC rise time with Parallax Smart Card Adapter

While implementing a T=0/1 protocol using a smart card reader I had obtained from Parallax, I noticed a behavior when applying power to the card. It seems that once the 3.3v VCC pin is brought high, ...
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1answer
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Where would I source components to build this IC and credit card sized Bluetooth device? [closed]

I'm interested in building a modified version of this device, however add custom IC work to it. I'm not an electrical engineer, however I know what features I want in this form factor. Specifically I'...
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1answer
117 views

I need a chip identified: TI 36A2DKK

I got a Smart Card reader out of a laptop. There's not much going on on the board, just the card receptacle on one side, with the contact springs, and two ICs on the back side: A Cypress ...
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260 views

PCB Trace detection

I'm currently working on a Smart-card based application, we're worried about users sniffing the communication between the card and reader by inserting a skimming type device into our hardware and an ...
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1k views

Is there any method to communicate with a car ECU?

I want to build a device with AVR to read the car RPM from its ECU. I don't know how to receive data from ECU at all. The thing is important for me is Reading car RPM. any suggestion? EDIT: The car ...
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812 views

How does rewinding a smart card antenna into a smaller coil leave it operational?

Here is a description of how one guy extracted the electronics from a smart card and then embedded it into a ring wearable on a finger. The card in question is more or less similar to the card in ...
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1answer
5k views

Is it possible to shortcircuit/damage an EMV card without a current source?

I've recently was accosted^H^H^H^H^H^H^H^ sorry, was gifted by the bank with contactless debit cards. They're standard EMV ("chip and PIN") cards apart from that. I've decided to buy "card ...
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467 views

What's the need for conductive bridges between the regions of a smart card contact pad?

Here's a scan of a "chip-and-pin" Visa Electron contact pad It looks like a metal plate divided into regions by narrow cuts. Look for example at regions marked A ...
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What's the purpose of such weird wiring inside this smart card?

Here's a scan of a stripped MIFARE Ultralight smart card That's some plastic film with (I assume aluminum) foil wiring acting as the antenna for both powering the chip and providing radio ...
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2k views

Detecting whether the card is present or not in a smart card reader

Recently I bought a 32320 Smart Card Reader. I had no trouble making the circuit, but I could not figure out what command to use to tell if the card is in or not. Any ideas?
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How do I shield a card like Visa payWave and MasterCard PayPass to block its communication?

This is basically a replication of this question on Personal Finance SE. Suppose there's a wireless smart card like Visa payWave or MasterCard PayPass or MIFARE Ultralight. The owner wants to ...
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1answer
1k views

RTU card of SCADA systems

In most of electrical SCADA systems, RTU (Remote Terminal Unit) panels are very common in power transmission & distribution companies. There are several cards inside each RTU panel, some are ...
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1k views

Visa payWave, MasterCard PayPass and ExpressPay, NFC and RFID

Since all those technologies use RFID contactless smart card and EMV, are they compatible? Is contact-less Visa card compatible with the Mastercard system? Are the systems compatible with NFC? I.e. ...
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Is there an electrical design reason for phone SIM cards being inaccessible until a battery is detached?

So far I haven't seen a cell phone that allows to detach the SIM card without first detaching the battery - the SIM card is placed behind the battery and inaccessible unless the battery is detached. ...
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Difference Between Contact and ContactLess smart cards

What's the difference between the contact and contactless smart cards more technically and physically is there identification to distinguish them ? EDIT: Some smart cards like debit card will have ...
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1answer
812 views

8051 smart card design

I'm trying to design a smart card interface using one 8051 UART and a Pierce oscillator circuit. The project seems to be working, because I'm getting response from the smart card. However, I'm having ...
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Why are chips used in electronic identity cards?

Why did Germany choose NXP's SmartMX chip in the new Electronic ID Card (see here) instead of having a more conventional solution, like an old credit-card-like approach? In fact, the question is ...
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1answer
539 views

Serial Smart Card Readers

I have a smart card that is used with a Respironics CPAP machine. I need to read the data off of the card. I have the Windows software for the card but I don't have a card reader just yet. Many ...