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Electronic Safe-Lock Design

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carlillos61

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Hi everyone

I am trying to design electronic lock with Quartus II, in order to use it with a FPGA Cyclone. I need to design a programable Electronic-Safe circuit, usin a 4x4 matrix keyboard, but without any microcontroller. It has to turn a green LED when the introduced code is the correct one, and a red LED otherwise.
Can someone post a diagram of the circuit, please?
Any ideas or help will be appreciated .


Greetings!
 

Hi,

Isn't the circuit diagram a part of this homework?

From the learning effect it makes more sense you look for similar circuits, adjust it for your requirements and post it here.
Then we can verify and discuss it.

Klaus
 

The peripheral circuit doesn't look different from a microcontroller electronic lock. FPGA IO-pins can do everything that a microcontroller GPIO does (and more, but that's not relevant for the present problem).

Consider how a 4x4 keyboard matrix can be read? Typically you have 4 inputs with pull-up resistors and 4 open drain outputs.
 

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