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just a normal 4 bit adder

The 4-bit adder which can do math on 4-bit integers and display on 2 7-segment LEDs.

This project is owned by Lu Xuan Minh - student of HCMUT.

Everyone can fork my project for the purpose of studying and researching.

Thank you for your viewing!

Lu Xuan Minh

Email: [email protected]

In the preceding section, we discussed how two binary bits can be added and the addition of two binary bits with a carry. In practical situations it is required to add two data each containing more than one bit. Two binary numbers each of n bits can be added by means of a full adder circuit. Consider the example that two 4-bit binary numbers B ₄B ₃B ₂B ₁ and A ₄A ₃A ₂A ₁ are to be added with a carry input C ₁. This can be done by cascading four full adder circuits as shown in Figure 5.48. The least significant bits A ₁, B ₁, and C ₁ are added to the produce sum output S ₁ and carry output C ₂. Carry output C ₂ is then added to the next significant bits A ₂ and B ₂ producing sum output S ₂ and carry output C ₃. C ₃ is then added to A ₃ and B ₃ and so on. Thus finally producing the four-bit sum output S ₄S ₃S ₂S ₁ and final carry output Cout. Such type of four-bit binary adder is commercially available in an IC package.

A simple adder that adds two 4-bit integers and returns the result on a hex display.
It also keeps track of the flags.
It can also subtract if the ADD/SUB is 1
ADD/SUB = 0 => add
ADD/SUB = 1 => sub

Hey, i built a 4 bit Adder circuit which can add a pair of 4 bit binary numbers. it consist of 7 XOR gates, 7 AND gates, and 3 OR gates

4-bit Adder with 7 segment displays