Recent content by jpmhdbest

  1. J

    0-30V Stabilized Power Supply

    can someone tell me what trimmer/s should be adjusted and at how much will you turn it.. thx in advance..
  2. J

    0-30V Stabilized Power Supply

    what might be the problem if the LED did not light up but the output voltage is around 25v? and also what might be the problem if a wire connecting the components at the lower left side of the schematic(somewhere around D5 and C1) was burned?
  3. J

    0-30V Stabilized Power Supply

    in the schematic you have given.. U1 has its #2 & #3 pins flipped right? why doesnt #7 & #4 pin flipped also? is the schematic wrong?
  4. J

    0-30V Stabilized Power Supply

    ok.. many thanks again.. il start building it nowadays.. any reminders you want to add more..?
  5. J

    0-30V Stabilized Power Supply

    i thought this project's Bridge needs to be 6-10 A / 50V diode bridge module.. may i also ask if the 2 pcs. 2N3055 needs heat sinks also.. 1 for each?
  6. J

    0-30V Stabilized Power Supply

    what about 30 V 4 A transformer? can i use this? correction.. KBPC10005 can have REVERSE VOLTAGE from 50 to 1k V.. FORWARD CURRENT 10.0/15.0/25.0/35.0 A.. now can i use this? http://www.datasheetcatalog.org/datasheet/good-ark/KBPC3502.pdf MANY THANKS AUDIOGURU^
  7. J

    0-30V Stabilized Power Supply

    they finally restocked MC34071 here in philippines.. i hope when i buy they wont run out again.. is my 30V 3 A transformer the right transformer to use? (JUST FOR SURE I GOTTA ASK FOR THE LAST TIME.. thanks a lot for the patience) i am also having a problem how to set the potentiometer and...
  8. J

    0-30V Stabilized Power Supply

    now its MC34071.. its voltage is at 53V.. still not correct.. what seems to be the problem here? i really wanted to build this power supply.. i really cant find MC34071 or TL081.. help me please.. how about this OP Amp Dual GP22V/44V 8-Pin SOIC...
  9. J

    0-30V Stabilized Power Supply

    please fix my schematics.. i don't know why it is not working properly.. how should i set the 2 potentiometers and the 3 trimmers to know the maximum and minimum voltage i can get? i couldnt find MC34071 here in philippines.. then i researched about its equivalent.. there i found TL081.. so...
  10. J

    0-30V Stabilized Power Supply

    sir may i request for a PCB design of the latest schematic diagram... if its ok..
  11. J

    0-30V Stabilized Power Supply

    ok.. how about this? MC33071/72/74, MC34071/72/74 are they all the same? also.. i cant find a 12000uF 63V.. can i just put a 10000uF+1000uF+1000uF in a parallel as substitution?
  12. J

    0-30V Stabilized Power Supply

    i guess its the same.. because they have same ...4071.. therefore CD4071 can be substituted to MC34071..
  13. J

    0-30V Stabilized Power Supply

    sir can a CD4071BE be a replacement for MC34071? thanks..
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