The R47: A new physical RPN calculator released today in 2025
16 days ago
- #scientific-computing
- #RPN-calculator
- #SwissMicros
- The R47 is a powerful, RPN-based programmable scientific calculator developed by SwissMicros.
- Firmware is functionally identical to the C47, which transforms a DM42n into an RPN calculator with a keypad overlay.
- Originated as a fork of the WP43 project, derived from the WP34S, using the decNumber library for precise arithmetic.
- Inspired by HP‑41C and HP‑42S, featuring a redesigned keypad with two shift keys.
- Advanced math capabilities: equation solving, integration, matrix/vector calculations, complex numbers, and base-n arithmetic.
- 34 digits of precision, exponents to ±6144, and up to 1000 named variables.
- Scientific functions: trigonometry, hyperbolics, logs, antilogs, and 2-variable statistics with plotting.
- Keystroke programming with tests, flags, looping, branching, and multi-line editor.
- Engineering utilities: financial calculations, unit conversions, date/time math, and built-in clock.
- Equation writer for solving, integration, derivatives, and basic plotting.
- High-resolution display with 4 stack levels, 3 menu rows, and customizable keyboard.
- Data management via built-in flash or USB for backups and restores.