On Mon, 8 Jan 2007, Jonathan Gray wrote: > http://wiki.nothing.sh/page/I-O%20Hack/%A5%B7%A5%EA%A5%A2%A5%EB%A5%B3%A5%F3%A5%BD%A1%BC%A5%EB > > Has better pinouts as it includes both types the USL-5P and everything > else. > > The basic idea is you want something that can convert from 3.3v TTL > voltage levels to proper RS-232 voltages such as a Maxim MAX3232. > > You can buy a kit for the cable from an electronics supplier, you can > buy a premade cable from IODATA/SuperTank or assemble all the parts > yourself.
A translation into various languages probably wouldn't hurt for the follks not comfortable with a Volt/Ohm meter. Though to be honest you should have one if you start soldering onto PCBs. The Maxim MAX3232 is a level shifter with charge-pump used to convert the UART interface to standard RS232 levels. I've moved over to using the Prolific PL2303 which is frequently used in mobile phone USB data cables. I can pickup the little PL2303 PCBs located in a dongle on the cable(FutureDial) for ~ US$3. The nice thing with PL2303 based data cables is it doesn't require a serial port on a notebook computer, also there in no power required from the embedded system, the PL2303 is powered via USB. See here for a good discussion on adding a serial port to an embedded system, http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort , it's a good reference for anyone who wants to play in this arena. This is probably more info than most of y'all wanted. ;-) diana
