OK, i tried to create a simple program in multisim :
to make 7 probe -light each one at a time .
I am new in multisim so I don't know where is my mistake can someone tell me the solution ? thanks .

 

"-Enable" of 4514 should be tied low and "EL" tied high.

Dont leave the Set and Reset of the JK FF open or it might not work in some simulators.

Dont you think the clock is too high for your eye to see the lights moving? I think 10Hz is enough.

A 330Ω resistor is needed for the light if LED is used, but should work in multisim.

Allen

 

OK i fixed that thanks.
now i have an assignment to let the probe like in this particular way :

*
**
***
****
*****
******
*******
********


how i can do that ?

 

There are many ways to do it. You can use shift registers, SCR or latches after the 4514 to accomplish what you've intended.

Here's a thread that would spark some ideas.

thread by imwolf

Allen

 

hi absf thanks for your answer.
I try to understand from imwolf thread but he did some stuff
that Istill don't know .
can you try tell me how I can do this with shift registers ?

 

Try take a look at post #34 of the link that I sent you.

Allen