Each of these monolithic counters contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter. The 74LS series of integrated circuits are CMOS based logic ICs. A divide-by counter, also called divide-by-sixteen counter, is a counter circuit used in the field of digital electronics, which produces a single pulse at the.
|Published (Last):||11 October 2010|
|PDF File Size:||20.94 Mb|
|ePub File Size:||3.2 Mb|
|Price:||Free* [*Free Regsitration Required]|
In this circuit implementation, I have configured a standard 74LS93 to count up to 16 in a ripple through fashion.
After i made the 4-Bit Binary Up Counter we had to modify it to counter to count from 0 to C and then reset.
For every 16 pulses at the input, it will generate one pulse at the output. Pin 1 connects to pin 12 so that the output of the first stage is fed to the input of the second stage. A divide-by counteralso called divide-by-sixteen counter, is a counter circuit used in the field of digital electronics, which produces a single pulse at the output for every 16 pulses at the input. In this activity we will simulate and analyze a 4-Bit asynchronous counter using a 74LS93 4-Bit Counter.
74LS93 – 4 Bit Binary Counter
However, in this application I need to connect the output from the first stage to the second stage, because I need all the stages to make a divide-by counter. After 744ls93 you must modify the circuit to have a count limit fromthen the SSD must disply a,b,c and then reset.
After that you must enter another ciruit that is given to you and figure out how it works. I use to think that A started in the 11s place but I was later corrected and I found out that the Hex Display counts from 9 and then goes on to A in the tens place and then all the way to F.
In this case the 74LS93 IC compresses four flip flops into one chips and their are so many benefits to this chip as I described in my calculations. The IC has four flip flops inside of it. Here is a truth table showing the input count and the ripple through outputs from the four JK flip-flops.
This way the first flip-flop provides a divide-by-2 function, whilst the rest provide a divide-by-8 function. Medium Scale is pretty much the same as small scale the only difference is that we use 74la93 flip flop chips.
74LS93 – 4 Bit Binary Counter
If it was on 9 as shown on my 2nd when the switch moved to ground, then it would stay there until the 74le93 was moved back to 5V or VCC. Every thing works according to my design. Tach Pulse Multiplier Donate. When the second SPDT was switched, then 74ls39 counter would reset back to zero and stay there until the switch was moved back to 5V.
The manufacturers have intentionally designed this to make the counter more versatile. Then the invrter switches the binary number to which equals Powered by Create your own unique website with customizable templates.
It is a 4-Bit binary counter.
74LS93 – 4-Bit Binary Cntr
The only time I kind of didn’t get it was when I had to make the counter count to C I could get it to count to C but when it came down to explaining why I couldn’t do it.
Each section has a separate clock input, which initiates state changes of the counter on the high-to-low clock transition. In the diagram above, you can see that the output of the first section pin 12 Q0 is not internally connected to the input of the second section pin 1 CP1.
This is the modified 4-Bit MSI counter.
This is the circuit that was given to us. This is a 74LS93 IC.
As you can see it counts to 9 and then resets to 0. The input is at pin 14 CPand the final output is at pin 11 Q3.