Help with USB interface

digitize · Post by **digitize** » Sat Jan 17, 2004 10:22 pm

I followed Tommy Tyler Version 1.0 Figure 11 layout for the JP1 USB interface. Once I had the board done I plugged the USB cable into my Windows 2000 PC. Windows detected the new hardware but did not ask me where to find the drivers for the Delcom device. So I went into the device manager window and saw a yellow exclamation over the Delcom device. I tried to manually install and I get the Windows blue screen and the PC reboots. I tried to uninstall and reinstall and had the same result. I made sure that my virus/firewall software was disabled during the installation of the driver. IR401 does not recognize the Delcom USB also. Also the USB cable came with two black leads ( I suspect on is signal ground and the other chasis ground which was a heavier gauge wire). Initially I used only the signal ground to the circuity on the perf board but when things were not working I tried it again with both black wires shorted and still had no luck. So do I have a hardware problem or software. Any ideas?

Mark Pierson · Post by **Mark Pierson** » Sun Jan 18, 2004 6:26 am

My guess would be hardware. Double check everything, especially the orientation of the capacitors.

digitize · Post by **digitize** » Sun Jan 18, 2004 11:22 pm

Mark you were right it was a hardware issue. I had a cold solder at the USB chip on pin 12 or VCC. Once that was fixed the driver loaded as normal and IR401 detected the USB interface. Thanks for pointing me in the right direction.

Now the fun begins....