Lpc2000

>From: "acetoel" <acetoel@...>
>Reply-To: lpc2000@yahoogroups.com
>To: lpc2000@yahoogroups.com
>Subject: [lpc2000] Alternative Circuit
>Date: Sat, 11 Dec 2004 10:45:21 -0000
>
>
>
>Hello...
>
>Unfortunately I cannot obtain any RS232 Driver for 3.3V, yes for 5V.
>In My LPC board I have 5V, so I was thinking about adding some
>transistor and convert the 3.3V from the LPC2106 to 5V and viceversa
>for the RX pin. I know this is not the best solution, but I think it
>could work. If not, what about making a Level shifter with
>Transistors? Does anybody have a schematic, or can help me with this?
>Thanks

The MAX202 will work at 3.3V, if you can't get hold of a MAX3232 (I've tried 
it). I've got details of a simple circuit using transistors that works with 
the PC (doesn't generate negative signals but that doesn't usually matter) 
that works at 5V and should be OK at 3.3V.

Leon