Building a Modern Scientific Calculator From Scratch
Scientific calculators haven't changed all that much over the years, but now, some of the best models are starting to disappear. Take the HP 35s, for instance. When this popular programmable scientific calculator was discontinued in 2021, used prices quickly climbed past $200. Modern enthusiast calculators can easily cost even more. Rather than pay those prices Inevati Systems decided to build an entirely new calculator from scratch.
The result is a scientific and graphing calculator designed around an STM32L431 microcontroller, a 400Ă—240-pixel Sharp Memory LCD, and a completely custom PCB. It supports both Reverse Polish Notation and conventional algebraic entry, graphing, matrix operations, equation solving, and a long list of advanced mathematical functions, all while being engineered for extremely low power consumption.
A look at the custom PCB (đź“·: Inevati Systems)
To keep the calculator as thin as possible, the PCB measures just 1.0 mm thick instead of the more...
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