You Do Need power plug adapter while traveling from Brazil to Bosnia & Herzegovina.

Here is Why You Need An Adapter

The outlet and plug type used in Bosnia & Herzegovina are C and F and in Brazil are C and N. This is how they look like.

Brazil

In Brazil, outlets of type C and N are in use.

Type C

Type N

Bosnia & Herzegovina

In Bosnia & Herzegovina, outlets of type C and F are in use.

Type C

Type F