Michael Rigby-Jones wrote:
> If the documentation suggests that the TTL output will work with a standard
> serial port, it's possible you have a particularly fussy serial port on
> yopur PC that dosen't like TTL levels.  If this is the case you can't simply
> add a MAX232 as they invert the data levels.  You will either have to invert
> the data before the MAX232 using e.g. a transistor or a NOT gate, or
> build/buy an RS232 line driver that dosen't invert.

that's what I thought...
next step, adding a 74LS06 inverter before the max232...
will come back after trying that ...

Sincerely

Amaury

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