How do you represent a binary '1' in a digital circuit?

In digital circuits, a binary '1' is represented by a high voltage level. This high voltage indicates that the signal is in an active state, and it's used to signify the presence of a logical true condition. The specific voltage level that constitutes "high" can vary depending on the technology used; for example, in TTL (Transistor-Transistor Logic) circuits, a high level may be represented by voltages ranging from about 2 volts to 5 volts, while in CMOS (Complementary Metal-Oxide-Semiconductor) technology, it can range from 3 volts to anywhere up to the supply voltage.

Using a high voltage to signify a binary '1' enables consistent communication between components in a circuit, allowing multiple circuits or devices to interpret data accurately. This principle forms the foundation of binary signaling and is essential for the correct operation of digital systems. Understanding this concept is crucial for working with logic gates, microcontrollers, and other digital devices, as it helps in understanding how they process and respond to binary inputs.