# Date of Birth

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## Introduction: Date of Birth

This will show you how to display your birthday on a seven-segment display. The materials you will need are as followed:

2. A breadboard companion and a 9V battery

3. Wire(red, black, white, 3 other colors)

4. Three HD74LS00P Integrated Circuits

5. Two 7402 IC

6. One 7404 IC

7. Two 7408 IC

8. Two 7432 IC

9. 7 resistors 220 Ohms or an R pack(4116R LF)

10. One 7 segment display common cathode(FND500/6780)

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## Step 1:

The first thing you will need to do is to make a truth table like the one above. Use your three switches: X,Y,Z or A,B,C. Write when and which segments you need to turn on to display you birthday when different switches are turned on and off.

## Step 2:

Then, you will need to make a K-map for each segment of the seven-segment display. Write the outcomes you get from each segment in a grid-looking thing. You will get a word or equation from the group of ones or highs in the K-map. In the first picture in this step, the equation is below the K-map.

## Step 3:

After that, draw a circuit for each segment according to your word or equation you got from the K-map.

## Step 4:

Then you will need to make each circuit in a circuit design software(I used Multisim): using three switches, power and ground, however many ICs you need(AND, OR, Invertor, NAND, NOR), a seven-segment display common cathode, and a bus line if you want, I would recommend one.

## Step 6:

And that is how you display your birthday using a seven-segment display. Good job!! And Happy Bread Boarding!!!

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## 5 Discussions

Is your Digital Electronics Teacher making you post it on Instructables? I had to do the same project about 2 years ago but we never posted it on the internet now I am seeing several at once.

if you don't understand how to create a DOB circuit then I advise you to check out jalensehlhorst or mine. We know how to explain it better.