I want to try connecting a USB cable to the Arduino using V-USB. On the schematics, they use a 3.6V Zener diode. I agree that's the easiest solution, except I don't have one, ordering one takes a while, and I can't source one locally. Could it be replaced with a voltage divider? (3.9k/5.1k) would give me 3.8V. Thanks in advance.
Speed IdentificationAt the device end of the link a 1.5 kohm resistor pulls one of the lines up to a 3.3V supply derived from VBUS.This is on D- for a low speed device, and on D+ for a full speed device.