Final answer:
All digital devices require power, often supplied by a battery, and integrated circuits, which allow them to process and handle digital signals represented by binary code. These components are vital for the functionality of any digital device.
Step-by-step explanation:
Two essential things that all digital devices need to work are power and integrated circuits. Power is commonly provided by a battery, as seen in digital cameras that either use rechargeable batteries or replaceable battery packs.
Integrated circuits are at the core of digital devices such as computers and cell phones, containing a complex assembly of electric circuitry on a single piece of silicon. These circuits are designed to handle digital signals that represent binary code, consisting of ones and zeroes.
This binary code is fundamental for devices to process and transmit data, essentially enabling the functions of encoding, storing, and communicating information in the digital realm. The invention of the integrated circuit (IC) was a major leap in technology that made it possible for digital computers to efficiently process large amounts of information, thus kickstarting the modern computer revolution.