4-Bit Calculator with Double 7-Segment Display

This is a digital 4-bit summing calculator that add two single-digit decimal numbers ranging from 0 to 9. The result is displayed using two 7-segment displays, which output the sum from 0 to 18 (e.g., 9 + 9). This basic design project takes advantage of digital logic components such as flip-flops, full-adders, display decoders, AND/OR gates, Schmitt Trigger inverters and other passive components to achieve the outcome that we needed.