At the lowest level, computers are physical objects designed to manipulate electrical signals. These signals are interpreted as binary digits: 0 (low voltage) or 1 (high voltage).
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💡 Every click, swipe, and keystroke is actually millions of logic gates opening and closing in nanoseconds, orchestrated by a compiler that translated your intent into the language of electricity. At the lowest level, computers are physical objects
Analyzes the intermediate code to make it run faster or consume less memory without changing its original meaning.
The output depends solely on the current inputs. Examples include Adders (for arithmetic), Multiplexers (data routing), and Decoders .
Circuits that include memory elements, where the output depends on current inputs and previous states (e.g., flip-flops, registers, counters). 2. From Circuits to Processors (Microprocessors) To help you find the exact educational material
The output of a combinational circuit depends entirely and immediately on its current inputs. They do not have memory.
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While there are many types of gates, most digital systems are built using seven basic types: the AND, OR, NOT, NAND, NOR, XOR, and XNOR gates. The AND gate outputs a 1 only if all its inputs are 1. The OR gate outputs a 1 if at least one input is 1. The NOT gate, or inverter, simply flips its input (1 becomes 0, and 0 becomes 1). The NAND gate is a combination of an AND gate followed by a NOT gate, producing the opposite output of an AND gate. Similarly, the NOR gate is an OR gate followed by a NOT gate. These gates are often represented by distinct schematic symbols and their behavior is formally described using a truth table, which lists all possible input combinations and their corresponding outputs. one 0 and one 1).
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Outputs 1 if the inputs are different (e.g., one 0 and one 1).