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3bit jk synchronous counter. it counts till 5 then resets if oyuwant to remove the reset just disconnect the async reset .

Experiment No 10: Implement a decade counter using basic gates.

Done by:

Saranga K. Mahanta

Scholar Id: 18-14-038

Done by: 

Saranga K. Mahanta

18-14-038

This is a 2-bit counter.  2-bit counters normally can count 4 numbers: 0, 1, 2, 3. However, this circuit counts up to 2 and resets at 3.  This can be scaled by adding more D flip-flops and setting the And gate at the location you want the count to stop at.  You can also set a starting number in a similar fashion.  This can be modified to a synchronous 2-bit counter using JK flip flops.

3 bit counter

A 2-bit counter that counts from 0 to 3! :D

Set "Count" to 1 to start counting and set it to 0 to pause the counter. Set "Increment/Decrement" to 1 to count up and 0 to count down.

synchronous binary counter

simple, you can expand if you want

A binary to 7 segment counter, pretty cool! (FINALLY, 5 DIGITS)

4 bit Asynchronous Counter using JK FlipFlops

it counts.

it counts

1. Mod 8 counter jk flip flop

it does what it says on the tin.

edit: the 13 is broken, but when I go in to edit everything breaks so :\ I'm pretty sure it's because I hooked up the 13 to the bottom left node in the "decoder4display"

edit: I went in to check and that is in fact the issue. I still have no clue wtf is wrong with the "decoder p1", as I changed literally nothing, but apparently I messed up. someone, please take a look at it and see what went wrong bc I really don't have any idea.

A completely original (4-bit) counter I made.

My first experiment with Subcircuits.

In this MOD 11 counter, it counts 0 to 10. i.e from 0000 to 1010, then it repeats itself. For 4 bits, 4 counters are required. Here -ve edge triggered T flipflop is taken.

J_A = 1, K_A = Q_C'

J_B = Q_A.Q_C, K_B = Q_A'

J_C = 1, K_C = Q_A + Q_B

J_A= K_A = Q_B; J_B = K_B = 1; J_C = 1, K_C=0

T_A = Q_A + Q_B.Q_C.Q_D; T_B = Q_C.Q_D; T_C = Q_D; T_D = Q_A'

4-bit synchronous counter created using JK flip flops where mode, M=0 is the up counter and M=1 is the down counter.

This is a 2 bit counter using d flip-flops that skips 0. The sequence is 1, 2, 3, 1, 2,... .

A multiplication circuit designed to multiply two 8-bit numbers, creating a 16-bit output. The values are unsigned, and input into two locations in a currently unconventional way. The output is stored in the flip-flop array to the right. The button at the top starts or resets the program. 

Simulator of slot machine. Press START button!

3 Bit Asynchronous Down Counter

Synchronous 0-7 up counter and 7-0 down counter using J-K' flip-flops (74LS109).

My first slightly complicated circuit!

yea

4 bit Asynchronous counter

Example of counter mod 5 made with flip flop JK

There's several buttons in the circuit. If you figure out what those do, the laws of time of this circuit's universe are yours to behold.

Note to future me to fix the following bug (if it even exists in the real world due to propagation delay). 

The set 1 function of #2 works in the sub-circuit but fails to work for the output pulse in the main circuit. This is troubling to say the least. So I've decided to change hour 12:00 to 00:00. 

digital electronic presentation