On Thu, 28 Mar 2019 23:52:08 -0700 (PDT)
gourav madhan  wrote:

> I am working on a project so I am thinking to use shift register as I
> have hundreds of inputs coming from user

Obviously you can cascade shift registers to handle hundreds
of inputs but depending on the nature of your inputs that might be
rather cumbersome.

http://shallowsky.com/blog/hardware/multiplexing-io-shift-registers.html

http://shallowsky.com/blog/hardware/multiplexing-io-expanders.html

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