What is it?

A 10 digit, with thousand marks ('), digital point, the symbols M, E and (-). Intended to mimic traditional LCD displays found in common calculators from the eighties and after but with all the complexity of the backplanes, segments, duty cycles and polarity handled by a 92 segment LCD driver with I2C interface which memory maps a segment to a bit. With a Microcontroller with lots of pins or multiplexer (28) and lots of patience, by unsoldering the PCB raw access to the multiplexed segments is possible.

Why did you make it?

I wanted to create an eighties looking calculator to learn about LCDs, matrix keyboards, fixed point math. I found a library that does the heavy lifting of transforming keypresses into display output and I couldn't find an off the shelf LCD with:

• enough digits
• calculator style symbols on the left
• easy to play with and not requiring flex connectors with weird pitch values (I tried to source them, with not much luck).
• works with 3.3V

What makes it special?

This display was born to be tinkered with. It came in a moment of weakness that pushed me to pay the tooling costs for designing a display from scratch. I have a sample and if there is market I can order a few pieces more to amortize the upfront cost.

Updated version

Comes with a larger (fits entire display) board and a Qwiic/QT connector for easier connection

International Shipping

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