wanted: RS232 driver PCB with 3 or more RS232 drivers

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stevech
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Posted by stevech: Tue. Sep 9, 2008 - 06:02 AM
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I cannot find a vendor for a ready-made or kit PC board that has a DB9 and an RS232 driver that outputs 3 or more RS232 levels, e.g., TD and RTS and DTR. And RS232-in for RD and CTS. And another DB9 RS232 port with just TD and RD.

anyone know of one? Better yet, a really low cost AVR board that has a mega128 or better and such an output.

I can breadboard one, but I'd like to purchase in low volume a ready-made PCB.

TIA
steve

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Learning and Information, General Electronics, ATmega128
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Bronze Marktheusch
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Posted by theusch: Tue. Sep 9, 2008 - 07:26 AM
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Quote:

I cannot find a vendor for a ready-made or kit PC board that has a DB9 and an RS232 driver that outputs 3 or more RS232 levels, e.g., TD and RTS and DTR.

http://www.olimex.com/dev/avr-p2...

Quote:

And another DB9 RS232 port with just TD and RD.

Hmmm--then you need an AVR with two UARTs...

Nowadays the Mega164 family might be the first choice.

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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stevech
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Posted by stevech: Tue. Sep 9, 2008 - 06:10 PM
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thanks - but those Olimex boards (I have some) and most others have a MAX232 or equiv. and these have just two RS232 drivers (and two receivers). A low cost board with a full modem interface or nearly so would have support for DTR. Just can't find one! Or a separate small module with just the RS232 driver that includes DTR.

PS: The app I'm doing needs a a large flash, say, 64 to 128KB.

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