This repository contains some information and ideas for building a nixie calculator and is provided as-is for educational, experimental, and hobbyist purposes only. However, this repository is only intended for suitable qualified electronics engineers. The project has not been tested for compliance with electrical, safety, or electromagnetic standards (e.g., CE, FCC).
Warning
Important
- Please read all documents in Docs before deciding whether to build the calculator.
Note
- The project is not affiliated with any of the mentioned service providers.
- No HP code was used to develop the RPN firmware.
- Software: ready to be reviewed
- Hardware: ready to be reviewed
https://www.youtube.com/watch?v=e9KX7zf6a1A
- 4 nixie versions: IN-12/IN-15A, IN-16, IN-17 and B-5870
- alternative 7-segment LED version
- 2 calculator engines: RPN (reverse polish notation) or algebraic
- 14 digits with decimal points, minus signs and dynamic scientific notation
- arbitrary-precision arithmetic up to 32 digits (experimental)
- 30+ math operations
- easy nixie replacement
- LED backlighting/underlighting (nixie versions only)
- mechanical keyboard with 40 switches
- custom keycap legends and colors
- WebSocket server option to display the stack and memory registers on a smartphone or pc
- RTC with battery backup
- clock, stopwatch and timer modes
- ESP32 based controller board
- PIR, GPS and temperature sensor module (optional)
- works with a standard DC 12V/2A regulated power supply (wall wart)
- no network connection is needed (all the settings are adjusted using the keyboard)
- 3D printed case
- open-source firmware
RPN IN-16 version
RPN IN-17 version
RPN 7-seg LED version
RPN IN-12B / IN-15A version
RPN IN-12A / IN-15A version
Algebraic B-5870 version with self-printed keycap legends
ИН-16 (IN-16) nixie tubes - production probably started in 1972
All nixie versions have LED lighting
Controller board with 3D models
Stack and memory registers can be displayed on a smartphone
RPN keyboard layout
Algebraic keyboard layout
