Simplistic Calculator

You read that right.

Several days ago, me and my friends were working on an Arduino project for a certain subject—Human and Computer Interaction to be precise. Fortunately, we weren’t doing this at 2 o’clock in the morning; instead, we were doing this project at around 5 p.m.

Even to convince my friends was hard work. I had to buy several rather expensive components, then storm through the heavy rain. I couldn’t just join my friends; well, I had this assignment that needed to take care of first.

Eventually, I joined and bought both of my friends some snacks. Fortunately, this time it wasn’t raining. After done with the assignment, I stayed for a while—until maybe 9 p.m.—and went home when I exactly had to pee; there was no water there (My friend said it was not unusual). We enjoyed our times, I hope.

Anyway, here are the main components and parts used in this assignment:

  1. Arduino Uno (and its’ cable)
  2. Jumper cables (you’ll know how many)
  3. 4 7-segment common cathode
  4. Breadboard (the big ones, but suit yourself)
  5. Keypad 4 x 4
  6. IC 7400 and IC 7404 (I presume it’s NAND and NOT Gate)

And here are the pictures:

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You can also see the source code and the video we recorded. Thank you.

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