Suggest a Arduino Calculator Tutorial

It's a great tutorial show you how to make a simple calculator using ATmega 328p microcontroler, same as the MCU on Arduino UNO.


This calculator has only simple functions (+, -, *, /), it supports decimal numbers and it can be reprogram or modify as you want.

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

links:
~ adafruit/Adafruit-GFX-Library
~ adafruit/Adafruit_SSD1306
~ Program Code