Digital keyboard (or 40 way selection panel) Minecraft Java 1.16+

This design should work for version 1.16+ (swap pot with chest and blocker items, use of target blocks mainly why that version). Feel free to attach this to larger redstone builds!
Another handy use for the CUD (Comparator Update Detector).


Since I used a copper door and bulb as an item, need snapshot version 23w46a or later (the design itself though works for 1.16+)
This doesn't work on bedrock edition, java only!

0:00 Use cases of build
1:25 Showcase
2:48 How it works
4:04 Other methods that wouldn't work
5:36 Building/Modifying Tips
7:17 More of How it works
7:52 Caution of item bug

Video References (order of appearance):
@LPG100 youtu.be/aQqWorbrAaY?si=MWEMvDJm7Mt6TIzH
@mattbatwings youtu.be/uGug-4xkw6M?si=Bvt2W_QYFwlSwCo_
@CraftyMasterman youtu.be/A6w4P25RRSQ?si=aa55OGDrO7opvai_
@cubehamster youtu.be/9W-T_7UyhQA?si=RGw9ZkfP45-N0GhN
@mooing_cowmilk youtu.be/1WJ-Ujixomo?si=R3G1F_xT0WZef4ov

Music:
C418 Cat
C418 Blocks

Possible Uses:
Redstone Computer Keyboard
Calculator
Mini-game controls
Password System
Search bar of your storage system

Or modify the output and it becomes a selector/control panel:
More then the regular design (9 crafter, 15 redstone strength base)
Controls of farms, doors, lights.
Another one is a selection of an item you want auto crafted