The calculator project instead of numpad i just use rotary encoder :3
I always wanted to try the knob (rotary encoder) and I think its now the chance to try it!!!
First I need to understand the concept of the rotary encoder first. (Well because this is the forst time I ever use this)
---- Huge Thanks to Android art
When the rotary encoder get rotate, both metal contact under the disk will be touched (IDK what to say) slightly off. When it rotate clockwise the metal B will contact before metal A and t goes in reverse for counter clockwise. So, due to that I wrote this.
if (knobmov) { // Check falling on pin A
if (!knobvalueb) // Check status pin B
CCW // Contact A when B is not contacted
else
CW // Contact A when B is already contacted
}There are several issue in the knob spinning. The microcontroller cant process it quickly enough to compare the input soo there will be some disturbance to the input.
The display system use "u8g2" libary and i use lopaka for designing the display :3
PS this part of the code is taking to much memory because i did use fullscreen buffer now i use 1 section buffer.
Next The Button , now you would ask that how can we reduce the input of the multiple button into 1 single pin ???
There's a method called "voltage divider" that slove the issue!
The voltage divided so the anaog input can translate the input and then calculate the input.
Most of the time the math s calcuated in the programe but not in string soooo i use the math libary i found. its called "tinyexpr.h" its a small libary for the math expression progress in string (array of char)
they can do all of the math function in c.
the video was taken with PC webcam, 8 megapixel no auto focus, on a pcb ruler
this video will explain and demonstrate on how to use the device and explain each part of the calculator (with comparation of the regular calcuator)
This is the future design for the future design (if i have more supply and more time)
This is the short version?
