Programmable calculator on Pico DIY


Author Message
zeitfest
Guru

Joined: 31/07/2019
Location: Australia
Posts: 655
Posted: 12:17pm 24 Mar 2024      

Yessss !!!  CLICKY BUTTONS !!!

I got sick of trying to hit dinky little screen buttons so I added a keypad. It uses a (ed - was typo) TCA8418, cheap and ultra-easy via an Adafruit breakout module running off I2C. Definitely the way to go. Wiring the keypad itself is tedious but a pcb will solve that.

The screen is much clearer and the lot will fit into a standard case. Much better !
As before, the Pn keys load/run programs from the sd card, otherwise programs can be sent from a PC.

Making progress..

Edited 2024-03-24 22:53 by zeitfest