Tarkul

Hey I found another circuit much more simpler and powerful with voltage 0-30V and current limiter (not very exact) 0-6/8A, using lm317 and two 2N3055. NO OPAMPS... lol.

Someone should change the circuit in the page http://www.electronics-lab.com/projects/power/003/. They should put the version with the MC33071....

Kool thx redwire

jajajaja. Im actually going up north to USA.... Maybe there I can receive the chips Do you know a good book in electronics? I've already taken circuit subjects(Circuits CA with complex numbers, frequency domain), but I don't know much about semiconductors in general.

I cant believe they have Chile Colombia and Puerto Rico, and not have Mexico.... Ill search it somewhere else How about the MC34080BP? Im losing hope on the circuit. I think ill go with a more simple circuit involvoing one or more lm317k parallel to get 3A 1.27V-32V with no current limiter though...

Hey I'va tried to find the MC33071 and the TLE2141. The closest I was able to find was MC33171P and MC34002N. The first one is close, but has lower quality. Do you think this matters to much? It can handle the voltage levels required

Hey audioguru, i inverted de D7 zener, but still gives me bellow 1V. Maybe I ought to change the diode. Just one question. I had some 6A rectifying diodes, which I used for the rectifying part. Do you think this can be the source of the error? The diodes only say 6 A 4 UTL So Im not sure of their code. Thanks again

Hey. Ive beentrying to fix the circuit. The problem now is that the ooutput voltage is steady at -0.5V!!! The good news is that the current limitng LED is now off... Voltage of D7 is -0.7V voltage of U2(out) is zero u3 is 32V and u1 is 8.3, D8 is at -5.6V. Thanks a lot audioguru

I made the version that is in the page http://www.electronics-lab.com/projects/power/003/. My problem is that the LED is always 'on', and the output voltage steadily declines. The only component taht gets a bit hot is the transistor 2n2219 (Q2) after having it connected 1 minute. The circuit doesn't respond to any of the potentiometers or the trimmer. The rectified/filtered voltage is 36V DC.

Hey umm does anyone that has a working supply did a voltage table for the nodes on the circuit? It would be of great help. Thanks in advance