/diy/ - Do It Yourself

What are the names of these components?

1. These look somewhere a cross between a transistor and IC chip.

2. Looks somwhat like a crystal. Except it's just silver foil.

3. Tiny little SMC. Three prongs on the bottom, one on top.

4. Looks like a transistor. Except it's got a freaky alien face. 'N3' inscribed on front.