Renewable password
Renewable password
We have a project that requires a user to enter a 4 Pin binary password for a safe box. Our professor requires the password to be changeable, however, in our lessons, we have only tackled about combinational circuits. How can we design a combinational circuit wherein the input-output scheme can be changed. thank you
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Hans Cadans
- Posts: 57
- Joined: Thu Apr 24, 2014 12:30 pm
Re: Renewable password
Hello Bruno212
I've read your question. Of course, it is not difficult, to give a complete solution.
I assume, you want to have a 4-bits solution.
I advise you, to design a 4-bits comparator. Such a design compares two 4-bits Numbers.
Every time, you change the nibble (4-bits binary number), to which your input is compared to,
you have to type a new password.
You can make this circuit with, only, primitives.
If you don't succeed, you can ask again, and I will help you further.
Best regards
Hans Cadans
I've read your question. Of course, it is not difficult, to give a complete solution.
I assume, you want to have a 4-bits solution.
I advise you, to design a 4-bits comparator. Such a design compares two 4-bits Numbers.
Every time, you change the nibble (4-bits binary number), to which your input is compared to,
you have to type a new password.
You can make this circuit with, only, primitives.
If you don't succeed, you can ask again, and I will help you further.
Best regards
Hans Cadans