Charles,

If you're talking about connecting two devices which are running off of
different power supplies, and you don't want them to have a common
ground, you could try using opto-isolators on the i2c pins. Make sure
your opto's can switch faster than the bit rate you're running your i2c
bus at.

Brad Stevenson, CET
The DPL Group - Telecom Techniques
506-635-1055 or 1-800-561-8880
http://www.dpl.ca

> -----Original Message-----
> From: Charles Laforge [SMTP:cjoachim@HOTMAIL.COM]
> Sent: Friday, January 16, 1998 4:10 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      I2C Ground connection
>
> Hi
>
> Me again and yes I have more questions on I2C.  Can you get away with
> NOT using a ground connection between two devices which talk over an
> I2C
> bus?
>
> Charles
>
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