Hi all,
I could use some tips for building this.
The gist of the project is that the system receives some sort of stimulus. Upon receiving this, a green-LED lights up and remains on for the duration of the countdown of a 7-segment from 9 to 0.
At 0, the 7-segment blanks and the green light turns off, and a yellow-LED turns on. After a duration, the yellow-LED turns off and a red-LED turns on. After another duration, the red-LED turns off and a stimulus is sent to another unit.
Thus far, I have my 7-segment set up counting down from 9 to 0 continuously.
I have no idea what to use for the initial stimulus.
At first I thought to use a flip flop, but then I realized that the green-LED would be flashing on and off as the 7-segment counts, since they would be using the same clock.
Then I thought to use a push-button to send a 1 to the flip-flop, but then realized I would still have the same problem. The flip-flop would turn the LED off again as soon as I stopped pressing the button.
I've looked for help online but most solutions seem to involve something called a 555 chip and capacitors, neither of which are available to me.
Does anyone have any tips or ideas for this?
I could use some tips for building this.
The gist of the project is that the system receives some sort of stimulus. Upon receiving this, a green-LED lights up and remains on for the duration of the countdown of a 7-segment from 9 to 0.
At 0, the 7-segment blanks and the green light turns off, and a yellow-LED turns on. After a duration, the yellow-LED turns off and a red-LED turns on. After another duration, the red-LED turns off and a stimulus is sent to another unit.
Thus far, I have my 7-segment set up counting down from 9 to 0 continuously.
I have no idea what to use for the initial stimulus.
At first I thought to use a flip flop, but then I realized that the green-LED would be flashing on and off as the 7-segment counts, since they would be using the same clock.
Then I thought to use a push-button to send a 1 to the flip-flop, but then realized I would still have the same problem. The flip-flop would turn the LED off again as soon as I stopped pressing the button.
I've looked for help online but most solutions seem to involve something called a 555 chip and capacitors, neither of which are available to me.
Does anyone have any tips or ideas for this?