Classic acoustic modem

Discussion in 'General Electronics Chat' started by sakbal, Sep 16, 2007.

  1. sakbal

    Thread Starter New Member

    Jun 23, 2007
    3
    0
    I;m looking for classic acoustic modem schematic. The type we used in the '80 with our Apple II, MSX, ZX Spectrum and C64.

    The Elektor magazine published a circuit in the '80 but I don't seem to find
    a copy or reference on the internet.

    Can anyone help?
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Take a look here:
    http://www.freepatentsonline.com/4367374.html

    You'll need to create an account (free) in order to be able to view it, however.

    Keep in mind that such a modem would have extremely limited usefulness nowadays; as they were limited to approximately 110 baud.
     
  3. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
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