@throwawayaccount7132

To save the trouble of viewers looking for explanation on whether it works:

Conclusion: The actual functionality of JK Flip Flops CANNOT be simulated in Logisim

Explanation:
The pont of having a JK Flip Flop is to overcome the racing condition problem in a SR Flip Flop i.e. when both inputs are 1. While the JK Flip Flop can be constructed in Logisim as demonstrated in this video, setting J and K simultaneously to 1 raises the oscillation error. This defeats the purpose of having a JKFF as its resulting functionality would remain as a SR Flip Flop, not as actually intended; it functions NOT as how it actually does outside of simulation.

@nathanhynes8063

To people watching this, you need to make the connections in the exact order shown in this video.  If they are connected in the a different order, it may throw an error, even if the circuit is identical.

@echonce1

It'll break upon saving and reopening, but you can fix it each time by:
1. Deleting the NOR gates
2. Deleting the part of the inner NOR input wires that actually connect to the gate
3. Deleting any part of the outer AND input wires
4. Rejoining the NOR input wires
5. Rejoining the AND input wires

(If you want to keep a JK_FF.circ saved as a reference,  I suggest recreating and saving the above steps using the Text tool)

@anthonymaestas7298

Incorrect! Do not follow this example!

@mahlangs

If yours does not run its easy to fix, delete any line in the input of the Nor Gate the insert input pin there then join the broken line from the output of the same nor gate and join it between the new pin and the Nor gate, then delete the pin after it runs correctly it will work properly

@siyabongamasuku6366

why isnt there a negative OR gate in the logisim app

@brandonmtb3767

logisim isnt very accurate

@diogofriggobr

I built the exact same circuit in logisim and when both J and K are 1 I get an oscillaton apparent instead of the toggle behaviour.  I tried adding buffers and setting the noise delay option on the tab project

@leosmi1

why my logisim doesn't work ff jk?

@leosmi1

TO SOLVE THE JK PROBLEM, WE HAVE TO DRAW THE CIRCUIT LIKE THE STEPS IN THE VIDEO...

@egehangurbuzer2976

f to mouse