Connect with us

cheap card reader.

Discussion in 'Electronic Basics' started by Stuart, Jan 30, 2004.

Scroll to continue with content
  1. Stuart

    Stuart Guest

    I'm basically trying to make a CHEAP card reader. Basically I want a
    way to read ID off a card. Now I can use some meory chips and give a
    card an ID but then I'd have to provide it clock cycles to retrieve
    that ID i.e. using a microprocessor (clearly avoidable). I ain't no
    pro and am in fact looking forward to learning all this. Since I
    encountered a dead end here. I came up with real primitive Ideas. now
    this card reader doesn't have to be optical or contact less, in fact i
    could do with a slot in which user could put in the card be verified
    and then take the card out. So this real primitive idea is that I put
    high resistance for a 0 and low resistance for a 1. then apply voltage
    at every one of those points. correspondignly getting a zero or 1 as
    has been assigned to that user. a port would then be able to read
    these values and thus give the system an id to be verified. problem
    with this is clumsy design and the construction of the card (not to
    forget the card's size). If perhaps there was a way to read the data
    stored in a memory chip and pass it like a bit stream in shift
    registers and these could be connected to the serial ports of the
    computer. Please gimme some insight into this and links could be great
    help. Please, if it's possible mail me at or
    . Thanx!

  2. Quack

    Quack Guest

    I am just in the middle of implementing smartcards into an embedded
    system, and there is no point to design your own reader or cards. Its
    all been done for you, just buy them.

    You can find lots of serial smartcard readers which will just give you
    the data to a serial port, so you can control it directly from a PC
    (embedded or normal) or a mcu if you want ..
    very simple, and not expensive.

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day