At 06:41 PM 6/23/03 -0400, Bob wrote: >----- Original Message ----- >The FTDI RS232 chip is your friend here. > >Bob Ammerman >RAm System and David Van Horn also: >Yes, that's what I'm doing www.mobilecommand.net >I have a 6 pin interface that carries two TTL handshake lines, and two TTL data lines, 5V power and >ground to an interface card. >If I plug in the 232 card, then it's a max chip, four caps and a connector. >If I plug in the USB card, then there's a bit more stuff on the card, but it looks the same to me. >One difference, the USB card is powered from the host over the usb cable, so it doesn't eat my >batteries. >The FTDI drivers create a virtual com port, and work quite well. Thanks! It looks good from here. The issues of Windows drivers seems to be solved now. I wasn't sure in the past just how it all worked out. I'll order parts and demo boards tomorrow and get started. Tom M. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.