Logic CIRCUIT
Logic Circuits are made up from basic logic NAND, NOR or NOT gates that are “combined” or connected together to produce more complicated switching circuits. These logic gates are the building blocks of combinational logic circuits. An example of a combinational circuit is a decoder, which converts the binary code data present at its input into a number of different output lines, one at a time producing an equivalent decimal code at its output.
Combinational logic circuits can be very simple or very complicated and any combinational circuit can be implemented with only NAND and NOR gates as these are classed as “universal” gates.
The three main ways of specifying the function of a combinational logic circuit are:
- 1. Boolean Algebra – This forms the algebraic expression showing the operation of the logic circuit for each input variable either True or False that results in a logic “1” output.
- 2. Truth Table – A truth table defines the function of a logic gate by providing a concise list that shows all the output states in tabular form for each possible combination of input variable that the gate could encounter.
- 3. Logic Diagram – This is a graphical representation of a logic circuit that shows the wiring and connections of each individual logic gate, represented by a specific graphical symbol, that implements the logic circuit.
There are a lot of web tools which you can use to show work of logical circuit, and we used a following:
LOGIC GATE SIMULATOR
https://academo.org/demos/logic-gate-simulator/
Logic Gate Simulator is a free, simple, online logic gate simulator. With this tool, user can investigate the behaviour of AND, OR, NOT, NAND, NOR and XOR gates.
This tool allows to create sequences of logic gates to see how they behave when connected to various inputs and outputs. Initially, there are presented with a simple on/off input and an output.
Initially, you are presented with a simple on/off input and an output. To connect them, click and drag from the hollow circle on the right side of the on/off switch, and release the mouse when you are over the solid circle on the left side of the "output" block.
For each of the logic gates, outputs are hollow circles, and inputs are solid circles. Our "on/off" switch and "output block" aren't actually logic gates, but they are required because they give us the 1s and 0s needed to see how the gates behave. Click the on\off switch and see what happens. It turns yellow. This is our way of differentiating between 0 (off) and 1 (on).
LOGIC GATE SIMULATOR
https://academo.org/demos/logic-gate-simulator/
Logic Gate Simulator is a free, simple, online logic gate simulator. With this tool, user can investigate the behaviour of AND, OR, NOT, NAND, NOR and XOR gates.
This tool allows to create sequences of logic gates to see how they behave when connected to various inputs and outputs. Initially, there are presented with a simple on/off input and an output.
Initially, you are presented with a simple on/off input and an output. To connect them, click and drag from the hollow circle on the right side of the on/off switch, and release the mouse when you are over the solid circle on the left side of the "output" block.
For each of the logic gates, outputs are hollow circles, and inputs are solid circles. Our "on/off" switch and "output block" aren't actually logic gates, but they are required because they give us the 1s and 0s needed to see how the gates behave. Click the on\off switch and see what happens. It turns yellow. This is our way of differentiating between 0 (off) and 1 (on).
Presentation: Logic Circuit
docs.google.com/presentation/d/1w9uZ1sz_am25u_nnukOdYfJT7CxQ8D8g19cHCR9YLtE/edit?usp=sharing
docs.google.com/presentation/d/1w9uZ1sz_am25u_nnukOdYfJT7CxQ8D8g19cHCR9YLtE/edit?usp=sharing
Logic Gate Simulator Students from Technical School ,,15th May" Prokuplje, Serbia |
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