If You get - 2.90 You likely swapped the multimeter pins plus and minus. Minus 2.90 into any Arduino will be bad.....
Instead of a novell, post schematics, would be a lot better.
If You get - 2.90 You likely swapped the multimeter pins plus and minus. Minus 2.90 into any Arduino will be bad.....
Instead of a novell, post schematics, would be a lot better.