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  1. K

    0-30 Vdc Stabilized Power Supply

    Hi! I have had great success with this circuit  :D But I have a problem. I'm trying to use relays to change the transformer taps from 24v to 12v. ( Series to parallell :) ). It works great in CV mode, regulation is fine. But when I have it in CC mode the current limiting turns off a good five...
  2. K

    0-30 Vdc Stabilized Power Supply

    Thanks a lot for the help!  :)
  3. K

    0-30 Vdc Stabilized Power Supply

    Thanks for the reply! :) I fiddled around with my board a  bit and lo and behold- the hysteresis thing just disappeared. Hope it ain't intermittent. The LED is still acting weird. Gonna do more research on that tomorrow. One thing though. Is there supposed to be a ~2v drop across the pass...
  4. K

    0-30 Vdc Stabilized Power Supply

    Hello again. I've taken a closer look at the PCB and fixed up some suspicious looking solder joints and so. I haven't gotten it working yet, rather it became worse  ::) Heh. I don't know what I did but now the CC LED is always on and it only becomes slightly brighter when the current is...
  5. K

    0-30 Vdc Stabilized Power Supply

    Oh ,okay I'm gonna try and look for errors on the PCB  :)
  6. K

    0-30 Vdc Stabilized Power Supply

    Hello everyone!  8) I am having some trouble with this circuit. I have milled out a PCB according to the schematic I attached. (it's from Eagle). Soldered everything up and it kind of works. The current limiting is acting weird though. Seems like there is some hysteresis on it. When I set the...
  7. K

    0-30 Vdc Stabilized Power Supply

    Oh, okay Thanks for the help  :)
  8. K

    0-30 Vdc Stabilized Power Supply

    Okay :) What about the large voltage fluctuations under load? Are they because of the breadboard too?
  9. K

    0-30 Vdc Stabilized Power Supply

    Hello! I have just hooked up a working prototype on a breadboard. Everything seems to be in order. Current limiting works and all. I have some problems though. There seems to be some 50hz junk on top of the output. Is that supposed to be there? Also some high frequency stuff. It's about 10mV...
  10. K

    0-30V Stabilized Power Supply

    ^^Thank you!
  11. K

    0-30V Stabilized Power Supply

    Hello! What do you guys think about this schematic I made? I would like 7 amps output. That means I should use around a .22Ω shunt resistor, right? I also plan to have 9 TIP3055's in parallel on a large heatsink. Couldn't modify it for the TO-3 one. I left that part out because this is just...
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