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current state diagram for a railway station
- jeanpierre92
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8 years 8 months ago - 8 years 8 months ago #2315 by jeanpierre92
pic1.jpg
hi community,
Can someone help me with creating a current state diagram. I tried several models but I failed every time. I dont know how to implement the delays and if that is a new state or not. It is a model for a railway bridge
This are the requirements:
Thanks in advance!
hi community,
Can someone help me with creating a current state diagram. I tried several models but I failed every time. I dont know how to implement the delays and if that is a new state or not. It is a model for a railway bridge
This are the requirements:
Warning: Spoiler! [ Click to expand ] [ Click to hide ]
Because we have no moving barriers available to implement the gate, we will implement it
in the form a blinking light. For this purpose, we wish to have a circuit with the following
specification:
• The circuit has a single input g and a single output x ; input g activates the blinking
light, output x represents the light.
• As long as g =0 output x remains 0 .
• As long as g =1 output x will change value with a frequency of 1 Hz; that is: x
will become 1 for half a second, then become 0 for half a second, then become 1
for half a second again, and so on.
• If, when g =1 and x=1 , input g becomes 0 , then the 0.5 -second period in which
x is required to stay 1 is fully completed, before x becomes 0 again and the
blinking stops. So, whenever x=1 it will always remain 1 for exactly half a second,
independently of g .
• Use the 4 Hz signal available on the BOX as clock for this circuit.
Construct a State-Transition diagram for this circuit. How many states do you need, when
the circuit is triggered by a 4 Hz clock? Design a sequential circuit, according to the rules
of the trade, and build and test it on the BOX. Keep this circuit for what follows.
in the form a blinking light. For this purpose, we wish to have a circuit with the following
specification:
• The circuit has a single input g and a single output x ; input g activates the blinking
light, output x represents the light.
• As long as g =0 output x remains 0 .
• As long as g =1 output x will change value with a frequency of 1 Hz; that is: x
will become 1 for half a second, then become 0 for half a second, then become 1
for half a second again, and so on.
• If, when g =1 and x=1 , input g becomes 0 , then the 0.5 -second period in which
x is required to stay 1 is fully completed, before x becomes 0 again and the
blinking stops. So, whenever x=1 it will always remain 1 for exactly half a second,
independently of g .
• Use the 4 Hz signal available on the BOX as clock for this circuit.
Construct a State-Transition diagram for this circuit. How many states do you need, when
the circuit is triggered by a 4 Hz clock? Design a sequential circuit, according to the rules
of the trade, and build and test it on the BOX. Keep this circuit for what follows.
Thanks in advance!

Last Edit: 8 years 8 months ago by jeanpierre92.
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- barbe.rousse
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8 years 8 months ago #2316 by barbe.rousse
Hi, Could you share your try with us?
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8 years 8 months ago - 8 years 8 months ago #2317 by jeanpierre92
Oke I uploaded my try. It didn't work out as you can see

Its a mess I cant figure out how to create the current state diagram correctly.
The down-most left page is the last one I tried


Its a mess I cant figure out how to create the current state diagram correctly.
The down-most left page is the last one I tried
Last Edit: 8 years 8 months ago by jeanpierre92.
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8 years 8 months ago #2318 by barbe.rousse
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8 years 8 months ago - 8 years 8 months ago #2319 by jeanpierre92
If the machine is in state B and /g'() then does it goes to state A or B? Because there are 2 outgoing arrows. And if the machine is in state B and /g() is high? Then it has to loop right? And can you explain what your states mean?
Thanks!
Thanks for your reply but I don't understand your diagram completely.barbe.rousse wrote: Something like that?
If the machine is in state B and /g'() then does it goes to state A or B? Because there are 2 outgoing arrows. And if the machine is in state B and /g() is high? Then it has to loop right? And can you explain what your states mean?
Thanks!
Last Edit: 8 years 8 months ago by jeanpierre92.
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8 years 8 months ago #2320 by barbe.rousse
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