- In This Part Of Your Final Project You Demonstrate An Alarm Clock Functionality In Multisim The Alarm Clock Has The Fo 1 (7.9 KiB) Viewed 71 times
- In This Part Of Your Final Project You Demonstrate An Alarm Clock Functionality In Multisim The Alarm Clock Has The Fo 2 (102.46 KiB) Viewed 71 times
The user can enable or disable the alarm. If the alarm is disabled, then the alarm set time is ignored. If the alarm is enabled and the alarm time has activated the indicator, disabling the alarm also resets the indicator. The alarm clock uses a RED probe to indicate that the alarm is triggered. Rather than incorporate this into Part A, you only need to demonstrate the alarm clock functionality with a single mod-10 counter. Just as with Part 1, all components in part2 should be clearly labeled, and the design should be neatly drawn. This design must be completed with specified parts to receive credit. If you solve this using a component that we did not cover in class, you will not be awarded any points. To help you implement this design, consider implementing the design in stages by completing the steps in the order shown. 1. Create a mod-10 counter or repurpose the one from Lab 9. It should have a HEX display on it that counts to 9 repeatedly. Use a clock to drive it rather than a switch or interactive constant. 2. Add the components below so that a 4-bit value can be set before the program runs. This component is the "setting of the alarm" part. For example, use a RED probe that turns on when the HEX display decimal value matches the decimal equivalent of the 4-bit value alarm time entered before the program was run. 4-bit comparator (74LS85N) • Use interactive constants to set the 4-bit alarm time. A RED probe to indicate the alarm matches the HEX display value This part should work so that if 0101 (5) is set on the interactive constants, the probe turns on when the HEX display shows "5". At this point, the probe should turn back off as soon as the HEX display shows"6". The cycle continues NOTE: We did not use the 74HC85 IC in a lab but briefly covered it at the beginning of module 6. The textbook also has a great explanation. 3. Finally, incorporate a flip-flop (74LS74N) and add as many interactive constants that are necessary so that the RED probe turns on when the HEX display decimal value matches the 4-bit value alarm time and remains on even as the counting continues. For example, this means that if the alarm time is 0101 (5 decimal), the probe turns on when the HEX display shows "5" and remains on when the HEX display shows"6". 4. The design shall provide the ability to turn the alarm off (i.e., turn the probe off). When the ALARM_ENABLE control signal is cleared to 0 alarm turns off if it is on, and the alarm ignores any matches in the future. When the ALARM ENABLE control signal is set to 1, the alarm is activated when alarm time matches the HEX display value. 5. The HEX display value is a free-running counter (i.e., it never stops) even when the ALARM_ENABLE control signal is cleared to 0.
Part 2-B: Stopwatch Explanation In a separate document, explain your circuit in 150-250 words. Your explanation must explain how each of the following works: The overall functionality of this circuit What a comparator is the underlying basics and how it is working in your circuit How the flip-flop is used and how it is reset NOTE: When writing your report, do not simply answer the questions in your report. When writing your report, please remember that your written explanation is scrutiny to gauge your understanding of what you created. Therefore all report requirements from part 1 apply to part2 as well.