1964 Antique MODEM Live Demo

Ethan Dicks ethan.dicks at gmail.com
Sat Jun 6 09:02:07 CDT 2009

On Sat, Jun 6, 2009 at 9:49 AM, Alexandre
Souza<alexandre-listas at e-secure.com.br> wrote:
>   Small tip here:
>   The FT-232 chip is a hell of expensive.

I wouldn't say it was that expensive - USB-to-TTL-serial cables are
$20 new here, and they are quite tidy and end in a dressed 0.1"
header.  For me, it's more of a case of being too fine-pitched for
easy breadboarding and I'm usually too lazy to cut a fresh board just
for USB-serial, so I use the ready-to-go cables.

> Buy an old NOKIA data cable (one
> with the fun port connector) or like (siemens, maxom, any very old data
> cable) for $1 and you have the USB-to-TTL-Serial(needs max-232 to be a full
> usb to rs-232 cable) for a cheap.

Can you point me to pictures of such cables?  I see phone adapters at
the thrift stores every time I go, and I don't mind hacking a $1 cable
(which is what they are here, too) to save $20.  I just don't know
exactly what I'm looking for.  "the fun port connector" doesn't mean
much to me - I've never owned a Nokia phone (in fact, I've only owned
two cell phones in 10 years, so I'm _not_ the right person for knowing
different vendors' quirks).

These data cables have an FTDI chip in them, but what identifier do
they send to the host?  I do some USB development (for LCD screens)
and have run across a number of questions raised about serial drivers
and chips not matching up and having to reset the identifiers and such
(or hack the driver to look for the "right" thing).



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