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RS232 to TTL

Posted by Rory Paul on March 13, 2011 at 11:11am

I am looking for a RS232 to TTL (Xbee Pro) adapter board that can take +7v / -7v on the RS232 side. From the what I can see most of the boards only accommodate 5v or they do not mention the spec. Any suggestions would be welcome.  

 

Thanks in advance..

 

Rory

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Replies

  • Tim Tamplin June 9, 2020 at 12:55pm
    xbee ttl work good
  • Ken March 13, 2011 at 2:08pm

    Anything that is RS-232 better be able to handle +/- 7V. And handle the bit inversion.

    If you are seeing something that is 5V, it isn't RS-232, it is TTL level serial. For example, what boards are you looking at?

     

    You might just make your own with a Maxim IC & a couple of caps (or not depending on the chip).

     

     

  • Michelle C March 13, 2011 at 1:33pm
    I have used xbee serial explorer boards from sparkfun and they seem to work ok. I think the rs232 signal spec is +/- 12v so anything that is spec'ed to handle rs232 signal voltages should be fine at 7 (I think).
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