The OR gate - Digital Logic gates
Gates can be combined to make combinational or
sequential logic circuits. combinational circuits
are a complex network of gates interconnected to
evaluate a pattern of output for patterns of
input.
Sequential circuits use memory elements, hence
output patterns depend both on input patterns and
the memory of history of events. An example of
combinational logic circuit is a seven segment
display decoder CD4511 and and example for a
sequential logic circuit is CD4029 up-down
counter.
Usage
of Schmitt trigger NAND Gate
OR Gate Simulation
This gate ORs the two inputs A and B, The Output
is high if either A OR B is high. There may be a
OR gate with many inputs, if one or more inputs
are high then the output will be high. AND and OR
gates can be wired with Diode logic.
This page requires images and javascript to
be enabled to try out the demo of the gates
below.
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A
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Q
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B |
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Toggle the red buttons above to
apply a 'high' or 'low' to inputs A and B and
watch the output Q.
Truth table
A
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B
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Q
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0
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0
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0
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0
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1
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1
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1
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0
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1
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1
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1
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1
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Interactive Digital Logic Gates Tutor Widget
Interactive Tutor for Learning Digital Logic, Like
NOT, AND, OR and XOR.
OR
gate with two 555
These Gadgets helps beginners learn some digital
circuit concepts. The Digital Logic is Studied by
operating Switches and observing LEDs on a Virtual
Breadboard. Lead Free
Screenshot
The Gate is a digital component that is used to
compute an output for certain inputs, the inputs and
outputs have two states high-1 and low- 0. Let us
assume high is 5V and low is 0V (like in CMOS). On a
high level the LED will light up and on a low level
the LED is off. Now let us see what Logic means.
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