A seven bit Adder with two digit hex output. You can add two numbers from 1 - 128. The result is shown in hex format. The place value of the number is from right to left with the MSB on the extreme left. The first stage is an half Adder succeeded by Full Adders for the rest of the bits. By switching the logic state you can manipulate the number to be added. Note that the result is in HEX format.