2 x dead Nano (clones) - possible fix - direct USB 5V to VIN patch.

Development Tools IDE 1.x
1

First let me state I have found out today they are Nano clones (two real ones are now on order from Gravitech).

While developing a project I have managed to kill 2 Nanos. One is not seen at all when connected via USB (the RX/TX lights flash) , the other refuses to accept its address according to syslog. I have seen similar USB issues with Nanos elsewhere on the forums, so I tried providing 5V to VIN on the Nanos. They both work with the 5V external supply, sketches can be uploaded and code runs.

To get them up and running I was going to solder a patch cable from pin 1 of the back of the mini-USB connector (5V line) directly to the VIN pin on the board. This will hopefully get me up and running until the real Nanos arrive.

My electronics knowledge is 20 years old and I have only be playing with Arduinos since Christmas so any feedback on whether this is a good idea or not would be appreciated.

2

VIN is usually the pin for unregulated power. Check the schematic, you probably want the pin called Vcc or +5V instead to bypass the regulator.

3

Ah, good call. The superfine wire arrived yesterday for the patch, so I will be doing them tomorrow - should a put a diode inline ?

4

I don't think so - look at the Nano schematic, I think you will find the USB power goes direct to VCC or +5 on the rest of the board.