Not complicated calculator (STM32F0, WH1602, RPN)

[Jeelman]

that is in two version - with touch sensor grid keyboard and with pushbuttons keyboard.
for the rest they similar - (double) variables for calculation, 15 stage for stack, 20 memory registers (also stored in eeprom),
some place for 3 microprograms in eeprom, small amount of built-in trigonometric function and so on.
"K,K,F"key sequence used for switching automatic/programming modes, "K,BACKSPACE" for run loaded program, "F,BACKSPACE" for load and run.

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some photos of test samples

 

[zuisti]

Nice (and hard) project, congrats.
Regards, zuisti

 

[Jeelman]

Thanks, Zuisti. that is not hard when interesting.

several words about pushbuttons keyboard - automotive foam tape over button pusher is useful for additional softness.

 

[Jeelman]

small changes in display output

 

[Jeelman]

version with precision adjustment

 

[Jeelman]

version with code lock protection. "K,K,*" key sequence for activation (enter '0' key for unhooking).