Model DM41

Credit Card Size, Landscape
Model DM41


The DM41 is a clone of the HP-41CX in a landscape orientated layout, the size of a credit card. A real-time clock is also included. The alphanumeric LCD screen of the HP-41C revolutionized the way a calculator could be used, providing user-friendliness (for its time) and expandability (keyboard-unassigned functions could be spelled out alphabetically). By using an alphanumeric display, the calculator could tell the user what was going on, displaying meaningful error messages ('ZERO DIVIDE') instead of simply a blinking zero. It could also prompt the user for explicit arguments ('ENTER RADIUS') instead of just displaying a question mark.


Specification Details
Construction Case made from a sand-blasted Grade 1 Titanium housing
Software ARM microcontroller emulating the NUT processor
Processor LPC1115 32-bit ARM Cortex-M0 microcontroller
Memory 64 kB internal flash, 8 kB RAM
Display type Reflective Positive FSTN
Display resolution 132 x 16 pixels
Display active area 69.1 mm × 10.0 mm
Display dot pitch 524 µm × 626 µm
Connectivity (PC) USB Mini-A port for firmware update and data exchange via CDC
Battery type 1 × CR2032 lithium coin cell, 3.0 volts
Battery life Up to 5 years
Sound 4 kHz resonance frequency Piezo-electric buzzer
Size 88 mm × 59 mm × 7 mm
Weight 75 g
Warranty 5 years