Okay, I've recently began to study electronics on school and tomorrow I got a BIG test, and I need big help because I cant seem to understand how I start the circuit.

Its a Binary counter with 4 JK-Flip Flops, and they're inverted at the start as you can see.

http://vvcap.net/db/gR-BVk0KYT9jQ1cZsG06.htp

Here is the whole circuit.

http://vvcap.net/db/PBXZ0e2u_mXxmNGvOrP4.htp

This is the one I'm not sure of, how am I supposed to make those "switches" with 0 and 1.

http://vvcap.net/db/GO9_7FQ6F_5X8wMZclo-.htp
Image of the task.

Please give me some tips

 

It looks OK to me. I'm not sure what the question is. Generally it is assumed (and you have the set/reset lines wired to make it so) that a counter starts on 0000.

These flip flops toggle on the negative edge, so as the previous number goes to zero the next digit goes to a one.

I used to bread board those circuits for fun when I started out, over 40 <mumble> years ago.

 

some flip flops have a set and reset built into them. the two switches that you mention are to set (store a one) or reset (store a zero) in the flip flop regardless of what is at the input.

when a flip flop first powers up the state that is stored in it is unpredictable. it can be a zero or one. so the set and reset functions are used to change the state of all the flip flops to a particular value so that everything else is predictable.

this is generally invoked by some device that can sense a power up condition and change the state of all the flip flops to a set state.

or in this case to reset the counter to either all zeros or all ones.