If you are referring to just my circuit, yes, the output will be essentially equal to the supply voltage until, the current limit is reached.
Where do you have the current pot set?
If it's set at zero, you will have zero output current.
No they are not additional transistors.
They are the ones in the voltage regulator circuit.
Sorry I didn't make that clear.

That's why is not working beacose i used other 2 transistors beacose you didn't say that it needs to conect to the auditional transistors

That's why is not working beacose i used other 2 transistors beacose you didn't say that it needs to conect to the auditional transistors

Can you combine the 2 circuits and send me the final circuit so i cqn build it simply

Can you combine the 2 circuits and send me the final circuit so i cqn build it simply

I am lost with the design so pls help

 

Below are the two circuits.
Output of U1 goes to the collector of Q2.
The two node 1's are connected together.
The two V+ are connected together.
Make sense?

 

Sorry, I just found another glitch.
The LM358 doesn't pull the output to all the way to zero when the output is shorted, so the current is not limited under those conditions.

Hmmm ... The 3055 Vbe isn't exactly tiny to start with. With two of them in series, and one of those increased by the large collector current, I would think a 358 output could get close enough to GND to starve them. Especially since the 358 GND is on the other side of the current sense shunt, another 0.4 V below the output emitter in a dead short. Just wonderin ...

ak

 

Just wonderin ...

In my simulation it wouldn't go lower than about 1.5V.

 

I'm curious, what does you sim show the 358 output current to be at that point? Part of the 358's fame is its ability to pull a valid TTL low, so my guess is that the current is relatively high. According to the datasheet, north of 10 mA.

ak

 

Below are the two circuits.
Output of U1 goes to the collector of Q2.
The two node 1's are connected together.
The two V+ are connected together.
Make sense?
View attachment 174519View attachment 174520

And now you are saying that the output of the comarator is going to q2 and in the previous circuit you say that the invering pin is to q2 colectors pin and that the output pin from the comparator goes to the base of the 2n3055.And you didn't say that the circuit is going before the voltage contoler.I AM SO CONFUSED RIRIGHT NOW.

 

Hmmm ... The 3055 Vbe isn't exactly tiny to start with. With two of them in series, and one of those increased by the large collector current, I would think a 358 output could get close enough to GND to starve them. Especially since the 358 GND is on the other side of the current sense shunt, another 0.4 V below the output emitter in a dead short. Just wonderin ...

ak

It's not using 358 it's using 339

 

Here are two identical simulations except the first uses the 358 and the second used the 339.
As you can see, the 358 output goes to a minimum of 1.3V when trying to unsuccessfully limit the current to zero, whereas the 339 goes down to 900mV, limiting the current to 5mA.

 

Here are two identical simulations except the first uses the 358 and the second used the 339.
As you can see, the 358 output goes to a minimum of 1.3V when trying to unsuccessfully limit the current to zero, whereas the 339 goes down to 900mV, limiting the current to 5mA.

View attachment 174529
View attachment 174530

And what abot the conections that are different in every circuit that you sent

 

And now you are saying that the output of the comarator is going to q2 and in the previous circuit you say that the invering pin is to q2 colectors pin and that the output pin from the comparator goes to the base of the 2n3055.And you didn't say that the circuit is going before the voltage contoler.I AM SO CONFUSED RIRIGHT NOW.

I always said the comparator output goes to Q2's collector, which is the correct connection.
When I said it goes to Q2, I meant Q2's collector.
I'm sorry if the previous statements confused you.

Just follow my last schematic in post #22.
It shows the comparator output going to Q2's collector.
Do you understand those connections?

 

And in this circuit the output is going to the 2n3055 and the negative input of the comparator is going to the q2 so that is why ia am confused about.Do i have a conection to the big 2n3055 transistor or just to bc547 colector

 

And what abot the conections that are different in every circuit that you sent

That discussion is between AK and myself.
If you don't understand it, you can ignore it.
The only circuit you need to use is the one in post #22.

And in this circuit the output is going to the 2n3055

Where do you see that?
None of my circuits show a direct connection to the 2N3055.
You seem to have difficulty following schematics.

 

That discussion is between AK and myself.
If you don't understand it, you can ignore it.
The only circuit you need to use is the one in post #22.
Where do you see that?
None of my circuits show a direct connection to the 2N3055.
You seem to have difficulty following schematics.

that one that i sent you is directly conected between the output of the comparator and the base of the 2n3055.Its obviusly direct conection as you can see

 

Its obviusly direct conection as you can see

It is not "obviously".
I see a resistor in series with the 2N3055 base.
That's not a "direct connection".

And please stop referring to other previous posts.
Please confine your schematic questions to the post #22 schematic.
Otherwise I'm out of here.

 

It is not "obviously".
I see a resistor in series with the 2N3055 base.
That's not a "direct connection".

And please stop referring to other previous posts.
Please confine your schematic questions to the post #22 schematic.
Otherwise I'm out of here.

I am going to try the circuit and give you feedback

 

Can i use TL071cn for the opamp beacose it's more compact and single comparator

 

It's not working i can ajust the current from 1 mA to 23mA and the voltage is not going more than 7 volts

 

Can i use TL071cn for the opamp beacose it's more compact and single comparator

No.
You need a comparator, not an op amp.
And the TL071 cannot operate from a single supply voltage in that circuit.

 

It's not working i can ajust the current from 1 mA to 23mA and the voltage is not going more than 7 volts

Post a schematic of the exact circuit you built.

 

Congratulations @crutschow ! The TS lost me at “variable constant”!