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Logical Electronic

The OR Gate

 
 
For example, a fire alarm must sound if a switch is pressed (A) OR if a smoke detector is activated (B).

A

B

Q

0

0

0

0

1

1

1

0

1

1

1

1

This is basically saying that Q comes on when either A or B are on. Note that my drawing skills are not very good, especially when you couple them with a mouse. So the OR gate is meant to look like an arrowhead. The general shape is there, but you just need to straighten it up a little. Note that the circuit diagrams become a little complicated now. So from now on, if there is a dot at a crossing of 2 wires, then the wires are joined. If there is no dot, then the wires just cross, with no connection or electrical conductivity between them.

This circuit can be represented using the following circuit diagram:


Keywords : OR, Gate, Decimal, Binary, Hexodecimal, Logic Gates
Writer : delon  |
17 Mar 2006 Fri   
|  6.887 Views
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