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Recent content by ali-libre

  1. A

    [SOLVED] Measuring current without using shunt resistance

    voltage of drain-source of your hexfet will be good option... V(Rds-on) is good shunt resistor for measure current....
  2. A

    [SOLVED] linear regulator with high surg current

    to const current or to regulator...?
  3. A

    reverse calculate of a transformer..!!

    hw did you defind it...? so, if i make it cool i have more power continusly...? how do i keep it cool...?
  4. A

    [SOLVED] linear regulator with high surg current

    witch is a better solution 1 , 2 or 3 of course 2 may not work another question is that T2 in circuit1 are act as base current source or not
  5. A

    reverse calculate of a transformer..!!

    i have an old transformer i'm know input 220V primary count winding =430*1mm wire secoundary = 4*(52* 2mm) each 24 Vac another info in this picture i want to know how to calculate to know output in W
  6. A

    How to make the good PCB for High Frequency (MHz) power converters?

    You can insert more detail to collect forum help.. Or you can read ipc2221b or another note about pcb design..
  7. A

    How to make the good PCB for High Frequency (MHz) power converters?

    I think one side pcb will be good enough...
  8. A

    feed tl074 op-amp by only +30v

    I will take output current under .5mA... But i cant under stand swing voltage...the only parameter i founded in tl074 datasheet is output swing voltage that is 12v for 10k... is swing be beter if smaller or higher...
  9. A

    feed tl074 op-amp by only +30v

    Thanks for replay... Why high load and not less than 10k..? How much for 36v... What change are you suggest...? I'm using devider for 15v becuase datasheet said .15v for virtual ground... Sorry for bad english...
  10. A

    feed tl074 op-amp by only +30v

    I have this schematic that i dont know it will work or no...? I have only and only +30v Input from 0-5v, i want output from 2 to 28v Tl074 because this is available in my region ,cheap & not bad slew rate,so . This schematic can be work or simple change make it to work...?
  11. A

    How to get 0 to 15 volts from DAC 0800 whein it is interfaced with a pic

    Just turn on the fet or controll it with dac? - - - Updated - - - You can try op-amp to amplify voltage by 3 or 5 to g9t 3-15v...
  12. A

    series tree or more power supply

    Arghhh....i will kill myselfe....:bang: Thank you for replay... i dont want series ac supply... I want series DC supply....DC DC Dc ... Ok...pls forgot transformers... Who will use transistor to couple ac...ha...ha...ha... whoare use op-amp to couple ac.... As you can see i can speak enlish very...
  13. A

    series tree or more power supply

    my idea is simple & famous , emitter folower or emiter feedback for negative supply negative transistor will use(this line writed to prevent spam...!!!) so how i must design DS supply to series them(more than tow) pls...
  14. A

    series tree or more power supply

    mmm... yes , no, thanks for replay the picture not defind what i was trying to say... at the end of power supply have dc voltage i draw them bad.. so look at second picture show that we have seprate dc supply output of them drive by transistor (and a op-amp(emiter folower)). schematic 1 work...
  15. A

    series tree or more power supply

    i'm designing a power supply wit hfour channel question is that how to design it to series them when needed schem 1 will work to provide +-vx but circuit 2 wil be work...? how i must design it to series it
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