The Hewlett Packard 15C calculator, part of the Voyager series, was a high-end scientific programmable calculator produced by Hewlett-Packard between 1982 and 198It was designed to handle complex numbers and matrix operations, making it a versatile tool for scientific calculations.
Features and Specifications
The HP 15C calculator featured a root-solver and numerical integration capabilities, making it a powerful tool for solving complex mathematical problems. It used bulk CMOS technology for its processor, resulting in low power consumption.
Here are some key specifications of the HP 15C calculator:
- Introduced: 1982
- Discontinued: 1989
- Cost: USD 135 (Original), USD 999 - USD 1799 (15C LE)
- Entry mode: RPN (Reverse Polish Notation)
- Display type: LCD seven-segment display
- Display size: 10 digits
- Processor: HP Nut core (1LF5 / 1LM2 / 1LQ9) / ARM7TDMI core (Atmel AT91SAM7L128) (15C LE)
- Programming language: Keystroke programmable (fully merged)
- Memory register: ..66 registers (R0...R9, R.0/R..R.9/R20, R.R65) plus RI, X, Y, Z, T, LAST X
- Program steps: 0...448 lines
- Power consumption: 0.25 mW
- Weight: 113 g
- Dimensions: 128 x 79 x 15 mm
Popularity and Collectors' Editions
Although the HP 15C calculator is no longer in production, its popularity has led to high prices on the used market. Collectors and enthusiasts are willing to pay a premium for this highly sought-after calculator.
In response to the demand, Hewlett-Packard released two special editions of the HP 15C calculator.
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HP 15C Limited Edition
The HP 15C Limited Edition (NW250AA) was released in September 201It features a flashable controller with an ARM7TDMI core, running an emulator to execute the old HP Nut code faster than the original hardware. The Limited Edition is powered by two CR2032 batteries and has a black text on a brushed metal back label. However, the power consumption of the processor is higher than that of the original HP 15C.
HP 15C Collector's Edition
In July 2023, a HP 15C Collector's Edition was released by the HP Development Company. It supports up to 672 steps for programs and up to 99 registers. The Collector's Edition incorporates fixes for known bugs from previous models and is powered by two CR2032 batteries.
Emulators and Clones
For those who can't get their hands on an original HP 15C calculator, there are emulators and clones available.
Emulators
Hewlett-Packard offers an official PC emulator for the HP 15C calculator as freeware. There are also commercial emulators available for Android and iOS devices, allowing users to experience the functionality of the HP 15C on their mobile devices.
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SwissMicros, previously known as RPN-Calc, introduced a miniature clone named DM-15CC in 201It emulates the functionality of the original HP 15C by running the original ROM image in an emulator on an ARM Cortex-M0-based processor. The DM-15CC comes in a compact size and features a dot-matrix display, switchable fonts, and USB connectivity for data exchange with a PC.
The Hewlett Packard 15C calculator is a highly regarded scientific programmable calculator that offers advanced features for complex mathematical calculations. Its popularity has led to high demand and collectors' editions being released. Emulators and clones provide alternatives for those who want to experience the functionality of the HP 15C calculator.