Date of Birth

Date of Birth Project Overview

Students must create a logic circuit with a seven-segment display and output their birthdate. Each segment of the seven-segment display will have a corresponding circuit for which students must find the logic. The switches will be turned on or off in binary order to display the birthdate correctly in sequential order.

Criteria

The circuit should be as simplified as much as possible.
If a segment has the same logic as another, students should connect the segment circuit to both segments.
Students should make a template for each segment to find the logic.

Constraints

There must be at least one simplified NAND and NOR a segment.
Current limiting resistors (150W - 270W) must be used.
The seven-segment display must be common cathode.
K-mapping has to be used to simplify the logic.

Template and Logic

To begin the project, students must create a template to find the output of each segment that corresponds to each variable. Once found, the logic must be simplified through k-mapping, resulting in a simplified version for easier logic implementation.

Sketch and Multisim

Simplified Sketch

The segment sketches, NAND-only, and NOR-only sketches are then used to create a complete circuit that is simplified completely. To simplify the circuit, outputs given through logic gates are used for other inputs.

Multisim Circuit

After creating the final sketch, Students must use Multisim to simulate it and ensure it works as intended. The three hex displays show the binary number corresponding to the switches' order.

Video Demonstration

In the video, each switch is turned on or off in sequential order, which is displayed on the three hex displays in binary. In order, each number of my birth date and dash is displayed correctly.

This video shows the PLD (Programmable Logic Device) on Multisim, which would theoretically be used for real-life applications.

Conclusion

Review of Project

The project was successful because the voting machine matched the criteria; the majority ruled, and the president overruled a tie. The circuit also only used AOI logic and was simplified for breadboarding.

Problems and Solutions

The Breadboard circuit was not initially working, but it was fixed by checking the connections and reconnecting them properly.

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