RTL State machine design help

Sistar said:

Here is a interview question and I am not sure about the answer. I hope some one can help me to solve it.

To enter the office people have to pass through the corridor. Once someone gets into the office the light turns on. It goes off when noone is present in the room. There are two registration sensors in the corridor. Build a state machine diagram and design a circuit to control the light

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ThisIsNotSam said:

Am I missing something? Is this the whole problem?

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ads-ee said:

Yeah, are two people allowed to walk in/out side by side, so they are detected as one person? ;-)

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dpaul said:

In my opinion the OP has not provided all the conditions.

OP: Have you tried to sketch a state diagram? Show us what you have understood and done!

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Sistar said:

Just assume that only one person will pass the sensor at a time

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ThisIsNotSam said:

check my earlier reply. that is all it takes. very very easy solution.

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dpaul said:

Perhaps the OP desires to have the entire SM bubble-diagram to be provided to him!
Till now he hasn't replied about his own understanding or his line of thoughts to solve the problem.

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IMO they already flunked the interview

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