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).

Filter by
Sorted by
Tagged with
0 votes
0 answers
57 views

How to implement smart card interface in PN7462 using SWP(Single Wire Protocol)?

I am looking forward to implement the attached design using PN7462 and integrated smart card interface(USIM). The problem is the SWP interface(Pin C6) of USIM. In the reference design, it is being ...
user avatar
0 votes
1 answer
41 views

Bidirectionnal level shifter not working on my clock to drive a smartcard

I'm actually designing a circuit that would permit me to drive a Smartcard, it's a pretty straight forward design : All the signal starting with CA are coming from GPIO of an IC that controls all the ...
user avatar
0 votes
0 answers
44 views

Is access reader need UL approval for US market?

We are a access reader manufacturer outside of US. Do we need to obtain UL approval for our reader in order to sell or install in US?
user avatar
0 votes
2 answers
395 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 ...
user avatar
0 votes
1 answer
823 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 ...
user avatar
1 vote
2 answers
96 views

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 ...
user avatar
  • 13
13 votes
0 answers
652 views

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 ...
user avatar
1 vote
1 answer
141 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 ...
user avatar
  • 603
0 votes
1 answer
124 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?
user avatar
  • 127
1 vote
1 answer
291 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....
user avatar
0 votes
1 answer
134 views

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 ...
user avatar
  • 1,318
1 vote
1 answer
2k 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 ...
user avatar
4 votes
1 answer
284 views

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). ...
user avatar
  • 12.2k
2 votes
2 answers
159 views

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. ...
user avatar
  • 12.2k
1 vote
1 answer
2k 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 ...
user avatar
0 votes
1 answer
258 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 ...
user avatar
  • 12.2k
4 votes
2 answers
329 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 ...
user avatar
  • 12.2k
3 votes
2 answers
5k views

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....
user avatar
0 votes
1 answer
343 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 ...
user avatar
  • 145
8 votes
2 answers
648 views

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/...
user avatar
  • 93
0 votes
2 answers
836 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 ...
user avatar
6 votes
2 answers
110 views

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 ...
user avatar
  • 12.2k
2 votes
1 answer
184 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 ...
user avatar
6 votes
3 answers
1k views

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 ...
user avatar
  • 12.2k
0 votes
1 answer
1k 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?
user avatar
1 vote
1 answer
215 views

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, ...
user avatar
  • 55
-3 votes
1 answer
103 views

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'...
user avatar
2 votes
1 answer
126 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 ...
user avatar
  • 915
0 votes
3 answers
284 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 ...
user avatar
  • 2,495
0 votes
3 answers
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 ...
user avatar
6 votes
3 answers
848 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 ...
user avatar
  • 12.2k
2 votes
1 answer
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 ...
user avatar
  • 525
19 votes
2 answers
610 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 ...
user avatar
  • 12.2k
13 votes
3 answers
1k views

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 ...
user avatar
  • 12.2k
0 votes
1 answer
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?
user avatar
  • 21
4 votes
5 answers
13k views

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 ...
user avatar
  • 12.2k
2 votes
1 answer
2k 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 ...
user avatar
  • 418
1 vote
1 answer
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. ...
user avatar
  • 149
7 votes
3 answers
611 views

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. ...
user avatar
  • 12.2k
0 votes
2 answers
11k views

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 ...
user avatar
1 vote
1 answer
902 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 ...
user avatar
  • 1,040
8 votes
2 answers
388 views

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 ...
user avatar
4 votes
1 answer
595 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 ...
user avatar