Thats what I was thinking. If it were/is possible. We could all have toaster sized power plants in our homes instead of a plug to the power company$.
The piezoelectric crystal is simply quarts, and is used in exactly the same way to ignite your BBQ grill.
The key element is the deuterium, and that is not something you can obtain at your local hardware store.
Not to mention, deuterium is not cheap!