How to make Calculator Arduino project

Hello!! In this tutorial I will try to show you how to make this simple calculator. I will use ATmega 328p microcontroler. I will borrow MCU from Arduino UNO. So we will make Arduino on perf board.
This calculator has only simple functions (+, -, *, /), it supports decimal numbers and it can be reprogram or modify as you want. This video will be longer than usual because I will try to give you detailed instructions how to build and program this calculator.

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Components:
2x 5x7 cm perf board
AtMega328P borrowed from Arduino Uno
128x32 I2C OLED display
16Mhz crystal oscillator
100nF capacitor
2x 22pF capacitor
17x 2 pin push button
LED
Switch
1K resistor for LED
10K pullup Resistor
3.7V battery

Adafruit GTX library
Adafruit OLED library

Code:

#ArduinoCalculator

[levitheentity]

Nowadays you can basically make everything. That's dope.

When I get a job, I'm building a robot. I don't even care.

[jaykeen]

Thanks for doing this video, this was a fun build, and was very informative to how to go about writing code for a calculator.
I'm developing my own calculator, after analyzing your code I have a very good idea which direction to go with my programming.

[QBarszcz]

you should implement games into the code so you can play on lessons haha

[jamesontario]

nice build. I had the display and some of the other part so I built one. Works well and looks great. :) thanks

[roborbiettinoisgone]

Everybody gangsta till I add mechanical switch to it-

[gartmorn]

You give the wrong pin numbers for the analogue pins on the 386. I know what you mean but some may think you mean the actual pin numbers on the chip! I am going to build this and try it once I have all the parts as it is a cool toy for the work bench! Did you write the code yourself? Well done!

[MarkRoth]

Well, since I made it to that point, here I am. :P
Great project. My son and I watched through and now I'll be digging through my parts to see what oled I can substitute. I particularly liked that fact that you concentrated on making a working product, not a finished product. I think we will use the old nokia screen to make math that matches with the way he is learning it now. Great overall project that leaves a lot of room for modification. Thanks for sharing it. :)

[bjlpfro]

What did you use for the standoffs and screws that hold the 2 boards together.

[raulmireles]

At my job i'm using a calculator all day and it's kinda boring, but with this i will make my own calculator. instead of normal buttons i will use mechanical switches from a desktop keyboard an some rgb lights. all this is unnecessary, but it will be cooler xd

[Wetu_Vexo]

thanks you for ur video, i have learn alot .

[Juan_Lennon]

I am having some issues uploading the script to the arduino, can somebody help??

[smellymala]

Who’s saving this to a playlist tryna make a pocket operator interface for your pi zero sampler box in 2021? 😂

[Juan_Lennon]

I have a question, If the battery runs out...how do you charge it, or can I conncet it using 2 AA baterys??

[stepaburianek]

How would you do it with 4pin buttons?

[christianbuenaventura]

What can be the problem if the buttoms didn't work?

[snowsnow]

May I know what is the recommended age to build this?

[BenjaminQuispetheLastPeruVian]

I came here because of Dr Stone latest

[abymohanan]

Thank you so much for this video 👍🏻👌🏻✌🏻

[sey]

Hello the button that prints 9 does not work. How do I fix this?

[larrytchogninou]

What would change if I use a 7x9 perf board ?