in the google advertising links next to you mesage in my gmail account
I found this
http://www.bestlinknetware.com/product-detail.asp?sku=150407&viewimg=y#vlimg

$6.95 - all rs232 signals - that would count for cheaper and more features?

On Feb 11, 2008 7:04 AM, Ariel Rocholl <arocholl@gmail.com> wrote:
> Hi,
>
> Just in case you find it useful, I found this very small USB-RS232 device
> cheap and convenient for lab use, debug etc.
>
> http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=2119
>
> If you only need RS232 connectivity to trace messages for debug and don't
> want to embed a FTTI chip in your circuit or use a bulky max232+capacitors,
> this saves you to have to convert the circuit to RS232 levels to interact
> with the PC, as it uses TTL signal level. It uses a prolific chip that has
> drivers for most windows platforms, it worked fine in WinXP to me for some
> time.
>
> Only limitation I found is it has only a pin for in/out. By default it works
> as out (from your micro point of view) so it is easy for debug and see
> messages in your PC but not as easy to send commands back from your PC to
> the micro. I hacked it to get the pins directly from the prolific chip so I
> get a TLL RX/TX separated pins, but I wonder if there is no such device
> available for lab use for a price like this with both RX/TX. Does anyone
> know other option? Only options I see here and there are true USB-RS232
> modules, but no-one as cheap as this one for TTL.
>
> --
> Ariel Rocholl
> Madrid, Spain
> --
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