Logic gate diagram examples.
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What a logic diagram is.
A logic diagram shows a digital circuit as gates. Each gate has its standard shape, lines carry 1s and 0s from the inputs through the gates to the outputs, and a small circle means the signal is inverted.
It is how a Boolean expression becomes something you can build or simulate, and how digital logic is taught and examined.
- Standard
- IEEE Std 91/91a-1991
- Engine
- schematex-logic
- Editable
- Double-click text, drag nodes
- Export
- SVG · PNG · PDF
Who uses logic diagrams.
Adders, multiplexers and latches for labs and exams, from the expression to the gates.
Diagrams for lectures and problem sets, redrawn in seconds when the question changes.
Alarm, interlock and control logic worked out before it goes on a breadboard.
How to make a logic diagram in three steps.
Describe it
One paragraph is enough to start.
See the drawing
Drawn by the right engine.
Say what changes
Every edit keeps a version.
Common questions
What is a logic diagram?
A drawing of a digital circuit as logic gates connected by signal lines, from the inputs to the outputs. It is the standard way to show a Boolean function as hardware.
Can I start from a Boolean expression or a truth table?
Yes. Type the expression, paste the truth table, or describe what the circuit should do. The gates are chosen and wired for you.
Which gates are available?
AND, OR, NOT, NAND, NOR, XOR and XNOR, plus flip-flops for sequential circuits.
Is a logic diagram the same as a circuit diagram?
No. A logic diagram shows gates and signals. A circuit diagram shows the electronic parts, such as resistors, transistors and supplies. Use the circuit diagram maker for that.
Can it draw sequential circuits?
Yes. Latches, flip-flops, counters and shift registers are drawn with a clock input where they need one.
What do the logic gate symbols mean?
AND has a flat back and a round front. OR has a curved back and a pointed front. NOT is a triangle with a small circle at the tip. A small circle on the output inverts it, which turns AND into NAND and OR into NOR. XOR is an OR with a second curved line at the back.
Do I need an account?
Yes, a free one. No card is asked for.
Other drawings for the same work.
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