Electronics are an advanced crafting resource in Ark and are created in the Fabricator. They are not used in a large number of Engrams, but where they are used, you tend to need a handful. Luckily, producing a decent number of them doesn't have to be painful.
Electronics can only be created in the Fabricator, and they require 3 Silica Pearls and 1 Metal Ingot each. While this may seem like a lot, the harvesting of both Metal Ore and Silica Pearls does not have to be a road block for you. Silica Pearls can be harvested in quantity in the shallow waters around some of the Obelisks on the Scorched Earth map.
For more information on gathering and processing the required resources, please see: