Diy macro pad

[Vikas.]

Hi guys, im planning to make diy macro pad as a project for my college i figured out how to use keyboard matrix and make pcb for it but idk how to work with ICs we cant use microcontroller in project it is a rule so can any one help me with it how to integrate ICs on pcb and use its logic to get out. Help brothers 

 

[FlyingPotato_is_taken]

You can't:

USB is out of the question as it is complicated. Using a keyboard IC/controller would be cheating.

 

Using 74 logic and the like is even for PS/2 a task that would blow the scope of your work. 74 series logic and EEPROM would be your best friend.

 

Ben Eater on using EEPROM for combinational logic:

 

LTT soviet keyboard (to give you an idea of what it would take; not a ps/2 either): 

 

[Needfuldoer]

On 7/20/2024 at 12:45 PM, Vikas. said:

we cant use microcontroller in project it is a rule

Hate to say it, but I think a macro keyboard is beyond the scope of the project. You're not going to interface with USB or even PS/2 without a microcontroller. (Especially not USB, since that's a bidirectional communications protocol.) You might be able to bit bang PS/2, or use a 65C22 if that doesn't count as a microcontroller, but that's above my pay grade.

 

That's not to say you have to completely start over from scratch. Maybe you could use your key matrix in a Stylophone-style Atari Punk Console music keyboard/tone generator?