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  1. Z

    0-30V Stabilized Power Supply

    Well, one will probably work, but gets VERY hot and needs a huge heatsink (with fans).
  2. Z

    0-30V Stabilized Power Supply

    Recently I got an 1000va :o by 24v, will work ?
  3. Z

    0-30V Stabilized Power Supply

    once more, RV3 is to set the maximum current to 3 or 5 amps (one way to set: short the PSU, adjust P2 (amp) to max, adjust the RV3 to desired maximum current, be quick, the transistor will get HOT). RV2 is to set the maximum voltage to 30v (how to set: in open circuit adjust the P1 (volts) to...
  4. Z

    0-30V Stabilized Power Supply

    The D12 led only light up when the current passing by R7 is over the limit set by P2 (U3). In which circumstances the wire burned up ?
  5. Z

    0-30V Stabilized Power Supply

    That
  6. Z

    0-30V Stabilized Power Supply

    Reply 767
  7. Z

    0-30V Stabilized Power Supply

    Page 55
  8. Z

    0-30V Stabilized Power Supply

    So if you join the both comon, when you out put them in series, it will short. :o
  9. Z

    0-30V Stabilized Power Supply

    if you DONT put Them in series, I think ther isnt any problem
  10. Z

    0-30V Stabilized Power Supply

    Thanks for your help, it was very useful. I really was lucky because the PSU is working  ;D. But as soon as I can I'll change for the MC34071. Thank you very much
  11. Z

    0-30V Stabilized Power Supply

    I made these changes and seems to be working  ;D ;D ;D Obs: OAmp: UA741
  12. Z

    0-30V Stabilized Power Supply

    I used the UA741. With the tension he'd never zero, so I put a third diode to the negative input is -2.1 V and also linked to the negative pin of u2, This worked perfectly for the tension, but not to the current, I was wondering if u3 can put a negative output? let say -0.7 V? this could solve...
  13. Z

    0-30V Stabilized Power Supply

    well, I do not know if it's because I changed the oamp, i have not found anyone here in Brazil, but still have a 0.6 A flowing when I short, maybe if I use a germanium diode instead of a silicon?
  14. Z

    0-30V Stabilized Power Supply

    audioguru, you can tell me what the special features mc34071 have? I noticed that when the current control operates (at minimum), still have 0.7 volts in the input of oamp (due to the diode), multiplying by the gain, we have ~ 1.8 V, so in case of short-circuit 0.6A pass because of the output...
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