I have the been able to make the circuit flash for 25 seconds at 4hz, I need to

Question

I have the been able to make the circuit flash for 25 seconds at 4hz, I need to be able to connect a 74112 jk flip flop to a 555 timer to keep the light on after 25 seconds. can someone draw me a schematic to help me make this circuit work ?

You have been asked to design and construct a warning light that flashes while a motor driven piece of equipment comes up to full speed. Once the equipment is switched on by pushing and releasing a pulse switch, your circuit is to flash a LED for 25 seconds at 4Hz with a duty cycle of 40% until the motor reaches full speed. After 25 seconds the LED should change and stay on constantly until the equipment is turned off by pushing and releasing a second pulse switch. If at any time the equipment is turned off, your circuit must turn off the ver page, a complete schematic for part 3, and a ng diagram are the only written requirement for this lab and it must be done on Multisim or an

Explanation / Answer

steps to followed

a. create an signal that can generated at end of 25 second of flash light

b. use that signal to enable the 74112 JK flipflop circuit

c. connect JK JK flipflop output to 555 timer which can be designed fo 40% duty cycle

d. timer output should be connected flash light which can glow continuously

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