USB Development Kit

[garylavers]

Hello,

I have the USB Development Kit and PCWH 3.212. Demo board works great, but not having much luck duplicating the circuit on a breadboard.
I have 6 ea. USBN9603 and a 28 pin SOIC-Clip for testing the USB chip.

Running the HID Example on an PIC16F877A.

I�ve duplicated the demo board circuit minus the signal generator and MAX232. Triple checked the connections, connected to USB on computer: RESULT: Windows detects the USB device but gives the �USB Device Not Recognized� message. I get a quick flash on the led connected to B3, then off.

The 24MHZ oscillator I�m using could be the problem but I doubt it. It�s a ESC CRYSTAL 24.000MHZ 20PF HC-49/US. Mine shows 24.0ESCH on top and demo board crystal shows 24.0ESCZ�not sure the difference.

I�m out of ideas.

Thanks a million.

Gary.

[rwyoung]

[garylavers]

Update to anyone trying this now or in the future...

Got it working. The oscillator I was using works fine. How do I know? I removed the crystal off the demo board and pub mine on. Demo board worked.

Problem was bad connection from the SOIC adapter on one of the pins. I was afraid to check each pin using my multimeter "buzzer" since it sends in ~3 volts. I don't know any other way to varify the lead connections (please let me know if there's a better way).

I've now switched to using a SOIC to thru-hole adapter from Digikey (part number A321-ND). It comes pre-soldered and works amazingly well.

[alexz]

I have used the similar from RS.
DIL Socket, RS: 197-2710
and W9500 Series SOIC to DIL Adapter 28 pins , RS: 158-2979
_________________
Alex