Hello everyone,
I've got to design a circuit using only logic gates, a 555ic timer, 7 segment display and diodes; so that my name and surname are displayed on the 7 segment display, each letter with a 1 second delay from the previous letter. Meanwhile, a red LED should be on when the name's letter are being displayed and a blue one for surname's letters.
For sure I will need to use flip flops here, designed using logic gates. I have chosen the master slave JK flip flop configuration using NAND gates. The problem is that I get a grey signal in flip flops' gates, so the circuit is not simulated properly, nothing is displayed.
Could you please help me with this issue? Is necessary to apply some triggering signals to the grey signals that would just provide some initial values, maybe some delta Dirac like functions? Or can it be solved in any other way? I am providing a screenshot of my circuit design as well.
I've got to design a circuit using only logic gates, a 555ic timer, 7 segment display and diodes; so that my name and surname are displayed on the 7 segment display, each letter with a 1 second delay from the previous letter. Meanwhile, a red LED should be on when the name's letter are being displayed and a blue one for surname's letters.
For sure I will need to use flip flops here, designed using logic gates. I have chosen the master slave JK flip flop configuration using NAND gates. The problem is that I get a grey signal in flip flops' gates, so the circuit is not simulated properly, nothing is displayed.
Could you please help me with this issue? Is necessary to apply some triggering signals to the grey signals that would just provide some initial values, maybe some delta Dirac like functions? Or can it be solved in any other way? I am providing a screenshot of my circuit design as well.