I have reread this thread's content, and find that Tony Gelonese said, "A simple communications setup is to use 2 npn transistors as switches and invert the signal from the micro to the PC and the signal from the PC to the micro.

For short cable lengths, (several metres), this will work very reliably at 115 KBaud. I have found no need to use a MAX232 for this application. "

All of which seems quite reasonable right up to the point at which he says, "... signal from the micro to the PC ..." which is complete nonsense with respect to RS232 standard communication.

He's right with respect to the receiver, though.

You jumped on this error, rightly, but because of my focus on the receiver, and, perhaps, your failure to mention it, I concluded that we were seeing another case of

ERIK: "You're nuts, you should do it this way...

and subsequently pursued the thread in this vein.

That's not what this was, and, for that, I apologize.

RE