When I wrote the text below, I didn't realize Jason was also making these modules. If I were you, I'd probably order Jason's... you're likely to get much better customer service.<br><br>John W2FS<br><br><div class="gmail_quote">
On Thu, Jun 2, 2011 at 11:12 AM, John Hansen <span dir="ltr"><<a href="mailto:john@coastalchip.com">john@coastalchip.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Actually most of those USB to RS232 device are really USB to TTL and then TTL to RS232, so what you really need is half of one of them. The chip in most of them is the venerable FT232RL from FTDI, which is actually a USB to TTL chip. If you are willing to design a circuit board for it and solder a very fine pitch IC on it, you can do this very cheaply. If you are looking for more of a "one off" design and don't want to do surface mount soldering, there are several modules that will do this for you. One of them is here:<br>
<br><a href="http://www.mouser.com/ProductDetail/FTDI/MM232R/?qs=sGAEpiMZZMuDw7xUFNwm7FLM102iGmY8g7HVF99Lsbg%3d" target="_blank">http://www.mouser.com/ProductDetail/FTDI/MM232R/?qs=sGAEpiMZZMuDw7xUFNwm7FLM102iGmY8g7HVF99Lsbg%3d</a><br>
<br>
John W2FS<div><div></div><div class="h5"><br><br><div class="gmail_quote">On Thu, Jun 2, 2011 at 10:58 AM, Bob <span dir="ltr"><<a href="mailto:k8ys@fuse.net" target="_blank">k8ys@fuse.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I need TTL.<br>
I have RS232<br>
I have USB<br>
I do not have a RS232 port. Rules out the standard USB to RS232 dongle.<br>
<br>
I think that I want to take an old cell phone to computer interface that has<br>
a USB to RS232 level converter. It is a common chip, and I have the drivers.<br>
<br>
I want to take the RS232 from the cell phone cable and feed it to a MAX233<br>
to get TTL in/out.<br>
<br>
Then use the TTL to talk to the IC706m2g to control the radio.<br>
<br>
Without reinventing the wheel, is there a "better way"?<br>
<br>
Bob K8YS<br>
<br>
<br>
_______________________________________________<br>
aprssig mailing list<br>
<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a><br>
<a href="https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig" target="_blank">https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig</a><br>
</blockquote></div><br>
</div></div></blockquote></div><br>