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parallel to usb ??? for printer

Discussion in 'Electronic Repair' started by Bill Finch, Sep 20, 2004.

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  1. Bill Finch

    Bill Finch Guest

    Is there any simple way to allow a printer with parallel port connrction (HP
    4L) to operate while connected to a usb port? Are special drivers required
    or are they included with windows?

    Bill
     
  2. Tim

    Tim Guest

    I used a Parallel-USB converter in the past. You will still need the
    Windows printer drivers, and you may have to install them manually.
     
  3. James Sweet

    James Sweet Guest

    Sure, they make USB printer cables, you can get them for under 20 bucks. My
    old parallel Okidata LED printer is on one right now. Seems like I didn't
    even need a driver.
     
  4. JURB6006

    JURB6006 Guest

    I don't see how they canconvert USB to parallel, they must only use two of the
    lines on it because that's what you got on the other end. Must be terribly
    slow. If someone cares to enlighten me feel free.

    Now I'm really befuddled because I have a parallel to RJ45 adapter, and no
    there is no PC board inside. How in the heck could something like that work ?

    JURB
     
  5. Hi!
    I would guess that because one bus is serial and the other parallel that
    some form of active conversion is required.

    I don't know for sure, but if memory serves USB 1.0 bus speed is about
    1.1Mbits/sec. A parallel port can do about that, so the speeds of the two
    busses aren't too different to start with.

    I found some information on one IC known as the InSystem USS-725. I couldn't
    seem to find a datasheet for it though...but if there was one, there are
    surely others... Looks like Cypress Semiconductor bought InSystem.

    William
     
  6. James Sweet

    James Sweet Guest

    They don't so much convert it as interface it. The cable has a chip in it
    that's essentially a parallel port interface card that plugs into a USB bus
    rather than a PCI or ISA bus. Has it's own microprocessor in it.
     
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