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Hello, Have you ever wanted to monitor both the TX and RX lines of communication between your PC and your microcontroller from a seperate computer/microcontroller? Well, now you can with the information I have provided below. You will need a 2.2k Ohm resistor, a 1n4007, or equivalent, Diode, a Female DB-9 connector, and some 3-conductor wire; I will be using Red, Black, and shield, as the colors for this example. For this example let's say that the communication link that we wish to monitor is called the Rs232 Backbone, and the computer that we wish to monitor the communication on the RS232 backbone will be called the monitor. Connect the black wire to pin-2 of the RS232 backbone, and connect the red wire to the PIN-3 of the RS232 backbone. Attach the Shield wire to pin-5 of the RS232 backbone. Now go over to the monitor side of the wire and attach the resistor to the black wire, and the anode of the diode to the red wire. Tie the other end of the resistor, to the cathode side of the diode and attach this to pin-2 of the Monitor's DB-9 connector. Then solder the shield wire to pin-5 of the Monitor's DB-9 connector. Now all you need is a simple computer interface program that will display the data. I may post this later as I am not at my home computer right now so I can't get the files. Salute! LF __________________________________________________ ">http://mail.yahoo.com [Non-text portions of this message have been removed]

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