Electronic – Arduino Nano – USB not present after reboot

arduino

I do have an Arduino Nano (v3.0) board and to my surprise the USB (and communication with board) is disabled after I restart the PC.

If I do unplug and plug the USB cable the USB port becomes available.

Is this an Arduino Nano "feature"? (As I see that my other Arduino UNO board works fine after a reboot)

Best Answer

Pin 19 (RESET) of the FT232RL (USB driver) seems to be unconnected according to Nano's circuit diagram.

Double check if this is indeed the case. If so, try connecting a 100nF capacitor from that pin to ground and a 10k resistor to +5V. This may reset the device long enough for the USB host (PC) to initialize.

schematic

simulate this circuit – Schematic created using CircuitLab

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