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USB-serial adapters — Parallax Forums

USB-serial adapters

ArchiverArchiver Posts: 46,084
edited 2003-06-08 16:47 in General Discussion
has anyone used a USB to serial adapter to talk to the stamp from a
usb port? The specs I'm seeing on the web say how fast data can be
transmitted serialy, but not how slow (ie if it would be slow enough
for talking to a basic stamp or PICmicros). Thanks

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-06-07 00:07
    Hi,
    I use a Keyspan USA-19W USB to serial on my stamps. I have a Toshiba Laptop
    without a serial port. I tries a Belkin and a few no name brands. They did not
    work with the stamp.
    I have not had any problems with the Keyspan, on Stamps or PLC's

    Alan Bradford
    Plasma Technologies

    >
    > has anyone used a USB to serial adapter to talk to the stamp from a
    > usb port? The specs I'm seeing on the web say how fast data can be
    > transmitted serialy, but not how slow (ie if it would be slow enough
    > for talking to a basic stamp or PICmicros). Thanks
    >
    >



    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2003-06-07 09:14
    yeah, I ended up making my own in the end. Best gadget I made
    all year!

    It uses the FTDI FT232AM chip, and works with PC's or Macs.
    Cost was just slightly below that of a Keyspan or Belkin.

    http://www.lennard.net.nz/lennardelectronics/electronics/usbtors
    232.html

    --- In basicstamps@yahoogroups.com, "Sam" <hard-on@t...>
    wrote:
    > has anyone used a USB to serial adapter to talk to the stamp
    from a
    > usb port? The specs I'm seeing on the web say how fast data
    can be
    > transmitted serialy, but not how slow (ie if it would be slow
    enough
    > for talking to a basic stamp or PICmicros). Thanks
  • ArchiverArchiver Posts: 46,084
    edited 2003-06-08 16:47
    Yes, most USB to serial want to advertise
    how fast they can go -- but the KeySpan 19W will handle
    down to 110 baud -- which is way slower than the
    BS2 needs it to be. I like their 4-port model,
    also, but it can be a bit pricey.

    Parallax has a vendor they like on their
    site also.

    Stay away from the Belkin -- as they don't handle
    the RTS/CTS/DTR lines accurately enough for the
    Stamp.

    --- In basicstamps@yahoogroups.com, "Sam" <hard-on@t...> wrote:
    > has anyone used a USB to serial adapter to talk to the stamp from a
    > usb port? The specs I'm seeing on the web say how fast data can be
    > transmitted serialy, but not how slow (ie if it would be slow
    enough
    > for talking to a basic stamp or PICmicros). Thanks
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