An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. The first solid-state electronic calculator was created in the early 1960s. Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator company Busicom. They later became used commonly within the petroleum industry (oil and gas). Modern electronic calculators vary from cheap, give-away, credit-card-sized models to sturdy desktop models with built-in printers. They became popular in the mid-1970s as the incorporation of integrated circuits reduced their size and cost. By the end of that decade, prices had dropped to the point where a basic calculator was affordable to most and they became common in schools.

## Project4-bit Binary Calculator2020-03-25

“I developed an interest in the way computers work on a fundamental level. I wanted to understand the use of discrete components and the circuits necessary to accomplish more complex tasks. One important fundamental component in a CPU is the …

## ProjectArduino Calculator Using 4X4 Keypad2020-03-25

“In this tutorial we will build our own calculator with Arduino. The values can be sent in through a keypad (44 keypad) and result can be viewed on a LCD screen. This calculator could perform simple operations like Addition, Subtraction …

## ProjectDIY Arduino Calculator Using OLED Display2020-01-02

“in one of my previous Instructable tutorial, we learnt how to interface an OLED with Arduino and basics of it, now its time to step up the game and make some project based on OLED, so in this tutorial, we …

## ProjectThe calculator project2017-02-09

“I had the calculator class running on my Mac. I had some Arduinos, seem to always have some about, and a 2.8” capacitive touchscreen from Adafruit. I put the two together and, well.. It just didn’t have enough …

## ProjectTransistor-Based Variable Current Drive for LED Calculator2016-04-28

“Ive put off working on my LED calculator project for far too long, at first trying to find the right handheld case to put it in and then later hoping to be able to manufacture a case myself. Im not …