The following four variable Karnaugh maps illustrate the reduction of Boolean expressions too tedious for Boolean algebra. Reductions could be done with Boolean algebra.

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getcalc.com's online 4 Variables K-map solver, table, grouping & work with steps to find the Sum of Products (SOP) or to minimize the given logical (Boolean) expressions formed by A, B, C & D based on the laws & theorems of AND, OR & NOT gates in digital electronics.

Online K-map (Karnaugh map) solver for 2, 3, 4 and 5 variables. Switch the values between 0, 1 and x (don't care) and see the result simultaneously.

Online Karnaugh Map solver that makes a kmap, shows you how to group the terms, shows the simplified Boolean equation, and draws the circuit for up to 6 variables. A Quine-McCluskey option is also available for up to 6 variables.

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The article explains the Karnaugh Map (K-Map), a graphical method for simplifying Boolean expressions in digital logic design. It discusses the K-Map’s structure, its application for 2-, 3-, and 4-variable problems, techniques for grouping adjacent cells, and utilizing “don’t care” entries for further simplification of logic functions.

STEM Success Center Guide To The K-Map (Karnaugh Map) In many digital circuits and practical problems we need to find expression with minimum variables. We can minimize Boolean expressions of 2, 3, or 4 variables very easily using the K - map without using any Boolean algebra theorems.

A 4 variable K-map has 16 cells, where each cell represents either a minterm or a maxterm of the function. The SOP (Sum of products) form and POS (Product of Sums) form of a four variable Boolean expression is shown in Figure 1.

Karnaugh map or K-map is a map of a function used in a technique used for minimization or simplification of a Boolean expression. It results in less number of logic gates and inputs to be used during the fabrication.