BrianJ wrote:Casey_Pittman wrote:Do these pin connections look right? The idea was to have the 25 pins on one side and the 9 on the other. That way you could connect the adapter cables to a usb hub inside of a project case and have a single USB connector on the panel. Pretty much exactly like the idea above. I would be more than happy to share the eagle files with folks if they wanted to set it up differently. But, this config should work well for a small aluminum project case.
-Casey
Casey,
I'm trying to make sure my cable is connected properly...I actually followed your diagram...however, upon watching the cable videos on youtube, it seems they conflict with what you have...he says the following:
DB9 pin2 goes to DB25 pin2,
DB9 pin3 goes to DB25 pin14,
DB9 pin5 goes to DB25 pin3.
Your drawing shows soemthing different...can you confirm?
Brian
as long as I remember, in in the DB25 that goes to the CPU, the pin 14 is the Transmit and pin 2 is Receive, and in the DB25 that goes to the console , the pin 14 is Receive and pin 2 is transmit, so when you connect the original straight cable, CPU transmit goes to console receive and console transmit goes to CPU receive, so, If you are connecting serial to USB converters in the middle, the corresponding transmit pins should go to the serial/usb receive pin,etc... then, the connections are different in each port, only Tx/Rx are inverted,
also If you are not 100% sure what is the transmit port, just connect a LED and a >1k resistor between the Tx pin and ground, and when you turn the d8b, If the LED flash, then its the transmit port, also the same with the console port, also with the serial/usb , if you send a character from hyperterminal, the transmit port should flash the LED :p