[0-30 Vdc Stabilized Power Supply]

The original project might work with a 24V/1A transformer but its ordinary opamps will be operating with a supply voltage higher than their absolute max rating.

If the opamps survive then the low output voltage indicates that maybe a transistor or diode is connected backwards.

i check all of the diodes and transistors and ... but it steel doesnt work

[0-30 Vdc Stabilized Power Supply]

One more thing....I built this project and I tested it with 1A 24V trans(beacause I didnt have 3A Trans)but it doesnt worked correct.LED was always On and the out put voltagewas 0.41 V evev when I turn p1 and p2

[0-30 Vdc Stabilized Power Supply]

The stupid thing will only show the current flowing trough it, but this hasn't always to be the current flowing trough the load :D
In plain: You can connect a switch across the output terminals of the project and produce a shortcut by pushing it. Then you can adjust the current limit, flick the switch back and use the project the normal way with the ammeter showing the current flowing trough the load.

beacause of my bad english...Icant understand your answer. i am also an amature in electronic.so please explain it more clear

Instead, connect the ammeter in series with the output transistors then its voltage drop is made-up by the circuit since it is inside the negative feedback loop. But maybe the voltage drop is high enough to reduce the max voltage output of the project at high current.

can you draw a diagram (or mybe a shematic) for me (about out put transistors)??????? :-*
i cant understand it.

You can use a voltmerter to measure the voltage across R7 which is the current-sensing resistor, then calibrate it for amps.

You can also use a voltmeter to measure the voltage produced by the current-setting pot then calibrate it for the amps setting.

and what is the range of each voltmeter????which of them show the current flowing trough the load.and which of them show the amps that was set with p2.
note : its not NOT NECESSARY for me to set current at special place.but it IS important for me to show the current flowing trough the load...

so help me please with diagram not with written message. :-*

I hope you apologize me for my gossips :-[ :'(

[0-30 Vdc Stabilized Power Supply]

(exuse me for my bad english.i am only a  learner)
hi to all
I want to built this power supply.but I have a question :
1.if I use an ammeter for it ...it will show the ampere that the load use or the ampere that was set ?

thank a lottttttttttt.
Arman