4.7k 1.3k 2 35
An Enigma Machine Simulator was created with an Arduino UNO and a Touchscreen LCD. Simulates Enigma I, M3, M4, the Plugboard and Uhr Switch.
1.8k 57 3 32
A pocket-sized KIM-1 replica with added '6502 programmable calculator mode'. Parts cost is about $10.
Project Owner Contributor

KIM Uno: A simple KIM-1 replica


4k 137 10 24
Control DMX equipment, such as lights, from a TI-84
4.2k 22 0 23
A programmable RPN calculator using way too many Nixie tubes
Project Owner Contributor

RPN Nixie Calculator


3.7k 36 2 19
Finally you can do math in the dark.
Project Owner Contributor

TI-84+ SE Backlight

Tyler Anderson

2.1k 175 5 18
CalcHack is a project to add missing features to graphic calculators. It adds many exciting functions students wanted for a long time.
Project Owner Contributor


Sean Dylan Goff

1.4k 17 0 16
NP-41 is a hardware realization of the Nonpariel calculator simulator. It executes the original HP-41C / CV byte-codes.
Project Owner Contributor

NP-41 RPN Calculator

Chris Chung

1.6k 10 0 11
An RPN based scientific calculator with four line display based on the MSP430 microcontroller.
Project Owner Contributor

RPN Scientific Calculator

Joey Shepard

507 16 0 9
A graphing calculator based on a modern 65C02 microprocessor.
Project Owner Contributor

6502 Graphing Calculator

Joey Shepard

913 13 0 9
TI-86 calculator replica based on STM32F407
Project Owner Contributor

TI-86 replica


242 5 1 7
The AriCalculator is a DIY calculator or a general purpose handheld device.
415 5 4 6
Stretching the limits of Arduino with an Arduino Duemilanove Graphing Calculator.
Project Owner Contributor


Blue Okiris

730 11 4 6
Homebrew scientific/graphing calculator
Project Owner Contributor


Wenting Z.

405 114 4 5
49-key mini keypad
Project Owner Contributor



744 23 4 3
I found the front case/keypad of an HP-21 in electronics recycling a while ago. I'm going to try to get it working again with Trinket guts.
316 6 0 3
An RPN scientific calculator with keystroke programming based on the LPC1114 microcontroller.
Project Owner Contributor

Programmable RPN Calculator

Joey Shepard