[aprssig] has anyone built/modified a USB to TTL level converter??

Jason Rausch jason at ke4nyv.com
Thu Jun 2 11:03:07 EDT 2011


We have an RS232 to TTL "bridge" that we sell (last item on the page):


We also have a USB to TTL adapter designed, but I have not ordered boards yet.  I actually planned to do that this week.  The module is a small board about 1" x 1" with a mini USB connector and a SIP header for the TTL side.  It's based on the popular FTDI 232RL IC.  You could add our RS232-TTL module to this to make a USB to serial adapter, as well:


Hope that helps!

Jason Rausch - KE4NYV
RPC Electronics, LLC

--- On Thu, 6/2/11, Bob <k8ys at fuse.net> wrote:

> From: Bob <k8ys at fuse.net>
> Subject: [aprssig] has anyone built/modified a USB to TTL level converter??
> To: "'TAPR APRS Mailing List'" <aprssig at tapr.org>
> Date: Thursday, June 2, 2011, 10:58 AM
> I need TTL.
> I have RS232
> I have USB
> I do not have a RS232 port. Rules out the standard USB to
> RS232 dongle.
> I think that I want to take an old cell phone to computer
> interface that has
> a USB to RS232 level converter. It is a common chip, and I
> have the drivers.
> I want to take the RS232 from the cell phone cable and feed
> it to a MAX233
> to get TTL in/out.
> Then use the TTL to talk to the IC706m2g to control the
> radio.
> Without reinventing the wheel, is there a "better way"?
> Bob K8YS
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