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Abraham Bagherjeiran

First-time hardware designer building tactile tools. Creator of StackCalc.

Palo Alto, CA
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abraham-bagherjeiran
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This user joined on 09/14/2026.

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A screwless printed RPN calculator: apps ship, firmware runs in an RP2350 emulator, and the board is in fabrication.
Project Owner Contributor

StackCalc32: A Tactile RPN Calculator

abraham-bagherjeiranAbraham Bagherjeiran

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Freedom at your fingertip.
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PolyKybd (Displays In Your Keycaps)

thpollthpoll

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143
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Open-source and open-hardware custom scientific RPN calculator
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OpenRPNCalc

anton-poluektovAnton Poluektov

17.9k
123
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An ARM based scientific calculator
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Scientific Calculator

ramn-calvoRamón Calvo

17.4k
43
1
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A programmable RPN calculator using way too many Nixie tubes
Project Owner Contributor

RPN Nixie Calculator

robertcbaruchrobert.c.baruch

9.7k
100
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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-chungChris Chung

9.2k
45
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It is a python handheld computer with a complete keyboard and a symbolic math engine inside it.
Project Owner Contributor

Galdeano handheld computer

angel-cabelloAngel Cabello

3.7k
1.4k
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DIY floating-point calculator based on AVR ATmega328P MCU and written in pure assembly
Project Owner Contributor

Hardware Calculator From Scratch

igor240340igor.240340

3.4k
29
4
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Homebrew scientific/graphing calculator
Project Owner Contributor

ArithMax

wenting-zhangWenting Zhang

3.1k
14
4
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Featuring USB-C!
Project Owner Contributor

HP Woodstock LiPo Battery Pack

cyulCYUL

2.8k
20
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The AriCalculator is a DIY calculator or a general purpose handheld device.
Project Owner Contributor

AriCalculator - A homemade handheld calculator

373876178373876178

2.5k
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A small pocket calculator for programmers and engineers, a mix between HP-42 and HP-16. Fully programmable in Forth.
Project Owner Contributor

4TH Calculator

peterPeter

1.8k
562
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Exploration of calculators, their emulation, mechanical aspects such as pretty buttons and quirky displays
Project Owner Contributor

Calculators

svofskisvofski

1.3k
7
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A simple user friendly RPN calculator for day to day calculations. Includes a mechanical keybord, date/time and count down/up clock
Project Owner Contributor

Retro RPN Desktop Calculator

jeroen-brinkmanJeroen Brinkman

1.3k
17
2
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A business card-sized calculator for developers
Project Owner Contributor

HexCalc

tyler-kleinTyler Klein

1.2k
10
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fully functional scientific calculator using evive
Project Owner Contributor

Scientific Calculator using evive

evive-toolkitevive toolkit

822
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Using a CortexM0 to build a calculator similar to the Sinclair Scientific Calculator.
Project Owner Contributor

RPN Scientific Calculator

santiagoSantiago

570
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The surplused (eBay) device contains a microcontroller, a keyboard, and a mono graphic screen and screams to be hacked!
Project Owner Contributor

RPN Integer Calculator from Smart Response PE

ray-burneRay Burne

299
2
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An RPN Graphing Calculator
Project Owner Contributor

RPN-83

timm-murrayTimm Murray

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