Full-Adder
Click on the inputs or a row on the truth table to change the addends or the input carry.
A full-adder adds three bits and produces the sum and the carry as outputs. Two of these bits represent the current place values of the added numbers, while the third bit represents the carry from the previous digit.
The truth table of a full-adder is as follows:
In this table,
The carry occurs only when at least two of the inputs are equal to logic-1. The sum is equal to 1 when only one or all of the addends are 1, otherwise it is 0.
Two possible circuit implementations of a full adder circuit are illustrated above. One of these implementations uses the classical logic gates and the the other uses two half-adders.
Full adder learning tool,
You can select the input values yourself or set them randomly.
To toggle the input values between 1 and 0, click on the inputs of circuits or the block diagram.
Or click on any row on the truth table to set the input values.
The DIE ICON generates a random set of values for the inputs.
You can download the solution as an image file with .jpg extension if you click on the "Download Solution" link at the bottom of the solution panel. You can share the downloaded image file.
Full-Adder