R47 Scientific Calculator
The R47 is a powerful, RPN-based programmable scientific calculator with an extensive feature set. Its software has been refined over many years, born from the vision of a dream calculator developed by a team of engineers and mathematicians, all dedicated calculator enthusiasts.
Community-developed and manufactured by SwissMicros, the R47 runs firmware that is functionally identical to that of the C47, which offers a way to transform a DM42n into a feature-rich RPN calculator using a dedicated keypad overlay.
The C47/R47 firmware originated as a fork of the WP43 project, itself derived from the WP34S. A core component carried through this lineage is the decNumber library by Mike Cowlishaw for precise decimal arithmetic.
I understand that the R47 firmware is not written, distributed, or maintained by SwissMicros, and I agree that any support for the R47 firmware will be requested and handled by the R47 team via email to support@47calc.com.
The software (firmware) is currently in beta.
R47 Scientific Calculator calculator features
- Solve equations and systems of equations
- Perform definite and indefinite integration
- Handle matrix and vector calculations
- Work with complex numbers
- Utilize base-n arithmetic
- Provides 34 digits of precision; exponents to ±6144; up to 1000 named variables
- Utilizes scientific calculator functions like trigonometry, hyperbolics, logs, and antilogs
- Features a 2-variable statistics with best-fit modelling and basic plotting
- Create programs using a multi-line editor
- Keystroke programmable with tests, flags, looping, and branching
- Conduct financial and date-based calculations, including time value of money operations
- Apply built-in unit conversions and library of constants
- Perform date and time math as well as built-in clock
- Equation writer with support for solving, numeric integration and derivatives, and basic plotting
- Features 4 stack levels, 3 rows of menus, and always-on status bar
- User-customizable keyboard and softkey-based menus
- Restoring states, programs, and configuration via USB-C
R47 Scientific Calculator hardware features
- A USB-C connector for complete and easy calculator contents backup
- Sleek and sturdy hardware based on a stainless steel shell
- Fast STM32U5 CPU
- Single coin-cell operation
- Low power - long battery life
- Image Converter
Convert images for use with SwissMicros calculators DM32/DM42/DM41X
| Aspect | Details |
|---|---|
| Construction | Case made from stainless steel, matte black Physical Vapour Deposition (PVD) coated and laser engraved |
| Software | Custom calculator implementation running on SwissMicros DMCP operating system |
| Processor | Ultra-low-power ARM® Cortex-M33®, at max. 160 MHz |
| Flash memory | 64 MBit additional flash |
| Floating Point Standard | decNumber library by Mike Cowlishaw |
| Display type | Monochromatic ultra-high contrast (14:1) transflective memory LCD display |
| Display resolution | 400 × 240 pixels |
| Display active area | 58.8 × 35.28 mm |
| Display dot pitch | 147 µm × 147 µm |
| Connectivity | USB-C, connects as USB mass storage device |
| Battery type | 1 × CR2032 3V lithium coin cell |
| Size | 77 mm × 144 mm × 12 mm |
| Weight | 205 g |
| Warranty | 5 years |
