PX41CX: A Modern Tribute to the Legendary HP41CX

Comes fully assembled.

Experience the fun and educational journey of the PX41CX, a faithful reproduction of the renowned HP41CX.

This DIY project offers an engaging, educational experience for electronics enthusiasts and calculator aficionados alike.

Features:

• Ease of Assembly: All through-hole parts for easy handling and soldering.
• Enhanced Clock/Timer: Resolution of 250ms with alarms.
• Increased Speed: Runs much much faster than the original HP41CX.
• Full RAM with 319 registers.
• Full extended memory with 600 registers.
• Continuous memory retention, even when the calculator is turned off.
• Auto Power Off: Automatically powers off to save battery life.
• Advanced Microcontroller: Powered by a single AVR128DA 8-bit microcontroller, with selectable speeds from 8MHz to 32MHz.
• Audible Feedback: Equipped with a speaker for audible keypress feedback.
• High-Quality Display: Features an ultra-low power monochrome reflective LCD with a resolution of 250x122 pixels (no backlight).
• Extensive ROM Storage: Can store up to twelve 4K ROM modules.
• Real-Time Clock: Includes a real-time clock using a 32.768KHz crystal.
• Power Options: Operates on a single CR2032 3V battery or can be powered via USB cable.
• Low Power Consumption
• Preprogrammed Microcontroller: The microcontroller comes preprogrammed.
• Connectivity: Supports Serial RS232 connectivity for flashing and data transfer, using a standard female USB mini B connector.
• Tactile Switches: Features tactile switches with a force of 70gf.
• Color Keycaps: Includes color keycaps for easy identification.
• Reversible Panels: Reversible top and bottom panels, with the top panel being ENIG (Electroless Nickel Immersion Gold).
• For more information on the original HP41C, visit the HP Museum. You can also follow the PX41CX development on the HP Museum Forum.

• USB to serial cable for connectivity.