>> If I'm not mistaken, the RS 232 interface requires plus and minus
>> voltages between 5vdc and 12vdc. The regulator included in the kit
>> mention above I believe is only a positive linear regulator. How is the
>> negative voltage achieved? (From the Linux workstation RS232 port plus &
>> minus pins?))
>Don't know, but it works. I just do the software. I could ask the hardware
>guy here, but then I would have to admit that I don't really know what's
All (or nearly all) is answered in the Maxim data sheets for the MAX3227.
Non-linearity is a wonderful thing.
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