USBDemo, something to learn USB a little bit

[Noise.be]

i use 18F4550
470 nf in Vusb / Vss
.1 uf ceramic in Vcc/Vss
4k7 in MCLR / Vcc
resonator 4mhz

I've used
220nF Vusb / Vss
.1 uF ceramic too
10k MCLR/Vcc
USB B type Connector
and it works fine now ;-)