4TH Calculator

A small pocket calculator for programmers and engineers, a mix between HP-42 and HP-16. Fully programmable in Forth.

Peter

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Variant with bigger display
07/07/2024 at 16:33 • 0 comments

OLED 128x64 pixels, Adafruit FeatherWing.
Improved button handler, LPM
06/30/2024 at 19:53 • 0 comments
Release v1.6.1
- Improved button handler
- Using Low Power Manager (LPM), draft
  - Green LED shows state: dark LED CPU is in STOP2 mode
  - After startup the USB blocks the LPM, you have to plug in/out the USB