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Synchronous counter
Project Overview
In this project we were tasked at creating a 60 second timer using our newly acquired knowledge of synchronous counters.
PLD Circuit
This project has many similarities and differences to the previous project. For example, this circuit counts up by one from zero just like the other circuit. This circuit also uses flip flops and the multiplexed segment. But instead of the 74LS93 for the ones place, I used a 74LS163 in this circuit. So essentially, this circuit implemented the synchronous counters to count to 59 while the other relied solely on the asynchronous counters to count to 80.
Conclusion
1. Synchronous and asynchronous counters have many differences. For example, for a synchronous load input you can simply input what number you want the circuit to display. For an asynchronous load input you must input one number over or under what you want the circuit to display.
2. A synchronous counter with a 74LS193 can count up and down unlike the 74LS163 which only counts up. 163' has synchronous load and clear while '193 has asynchronous load and clear.
3. It all starts out with the clock. It is wired to the synchronous counter that starts counting from 0, hits 9 and then repeats. The flip flops up top, are connected to the bottom circuit using the AND4. This is so that when a nine is displayed at the bottom, a signal is sent to the flip flops up top, which count up one for each 9 detected at the bottom.
4. The people around me didn't really have circuits different from mine. However, it is very much possible that this circuit be created in a different way.
2. A synchronous counter with a 74LS193 can count up and down unlike the 74LS163 which only counts up. 163' has synchronous load and clear while '193 has asynchronous load and clear.
3. It all starts out with the clock. It is wired to the synchronous counter that starts counting from 0, hits 9 and then repeats. The flip flops up top, are connected to the bottom circuit using the AND4. This is so that when a nine is displayed at the bottom, a signal is sent to the flip flops up top, which count up one for each 9 detected at the bottom.
4. The people around me didn't really have circuits different from mine. However, it is very much possible that this circuit be created in a different way.