> -----Original Message----- > From: piclist-bounces@mit.edu On Behalf Of William Chops Westfield > Sent: Wednesday, August 17, 2005 8:38 PM > > > > No, we'd want an rs232 (+/- 3V) to rs232 (+/-12V) converter, > which lacks the inversion part of a ttl to rs232 converter. > > > A small box using just level translators and a wall wart ? > > > Alas, +/-12V makes for a relatively complex wall-wart or > post-WW power supply... > > BillW Buy two of them, wire the TTL sides together, add +5V power for the MAX232's and you have what you want. To save $ and space you could use a level translator chip with multiple I/O's. IIRC, there are chips available with 8 recievers and 8 transmitters Paul Hutch -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist