The purpose of this project is to create a circuit that can count from 0-59 then reset to zero and repeat. There also had to be a switch to reset the simulation to zero
PLD Circuit
This project is similar to the DMV display because they both counted to double digit numbers. They are different because they count to different numbers and for the DMV project it required the circuit to stop at the last number which was 80. For the 60 second one it requires the circuit to reset to zero and keep counting.
Conclusions:
.1.Asynchronous counters only have the first counter connected to the clock and the rest are connected to the counter before it.Synchronous counters gate's are all directly connected to a clock which eliminates the ripple effect which effects Asynchronous counters.
2. A 193 circuit is a asynchronous counter. Also it can can count both up and down. A 163 circuit is a synchronous counter. It can only count up
3.The first thing that I did to build my circuit was copy the Multiplexer from the DMV project that I did earlier. I used my DMV project to help me get a basic idea on what my 60 sec counter should look like. I did this because I needed to still have my circuit set up in a way that when the ones place gets to 9 and resets it triggers the 10s place to change by one. I also ended up changing my gates to 163 synchronous counters instead of the 193 gates that we used in the DMV project. I did this because these were the gates that we were used to use in the instructions and it will also reset to 0 without the need to be reset. I connected the clock of my first 163 gate connected to the nand gate what was connected to the wires for the ones place. Then I wired them so that the 10s would only go up to 6. Once I had it working I transferred it to the pld chip and wired 26-32 in a-g. Then I wired the Digital writer which powers the circuit into 14. l I also wired the reset switch into point 9. We also had to wire points 33 and 34 to the D0 and D1 points so that the hex displays would show up.After I had it wired completely I had to set the digital writer to ramp mode. Once I did this my 60 second counter was working fine.
4.No, all of the designs I saw were very similar. The only real difference I saw was that some people used or and nor gates instead of and and nand gates.
2. A 193 circuit is a asynchronous counter. Also it can can count both up and down. A 163 circuit is a synchronous counter. It can only count up
3.The first thing that I did to build my circuit was copy the Multiplexer from the DMV project that I did earlier. I used my DMV project to help me get a basic idea on what my 60 sec counter should look like. I did this because I needed to still have my circuit set up in a way that when the ones place gets to 9 and resets it triggers the 10s place to change by one. I also ended up changing my gates to 163 synchronous counters instead of the 193 gates that we used in the DMV project. I did this because these were the gates that we were used to use in the instructions and it will also reset to 0 without the need to be reset. I connected the clock of my first 163 gate connected to the nand gate what was connected to the wires for the ones place. Then I wired them so that the 10s would only go up to 6. Once I had it working I transferred it to the pld chip and wired 26-32 in a-g. Then I wired the Digital writer which powers the circuit into 14. l I also wired the reset switch into point 9. We also had to wire points 33 and 34 to the D0 and D1 points so that the hex displays would show up.After I had it wired completely I had to set the digital writer to ramp mode. Once I did this my 60 second counter was working fine.
4.No, all of the designs I saw were very similar. The only real difference I saw was that some people used or and nor gates instead of and and nand gates.