I have two different usb to serial converters. Both have 5 pins with 3v3, txd, rxd, gnd, 5v. In the past I have used them to connect to raspberry pis and arduinos successfully.
I have a board developed by my work that I can connect to using a pci card in my computer at work. All I do is connect the ground and tx from the board to the gnd and rx going to the pci card on the computer. I can then see the board output.
At home when I plug the usb-to-serial adapter into my computer the device manager recognizes it fine. I can connect the ground pin of the adapter to the ground pin of the board but when I connect the tx of the board to the rx of the adapter windows give the usb disconnect sound and the device manager refreshes and the com port is gone.
Any one have any idea on what is going on? I have never had to connect the 5v or 3v3 pins before. Anyone run into this and have a solution?