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  1. ante1

    What is a voltage regulator?

    Summing the inputs from this and another tread took me to that conclusion my dear Watson! ;)
  2. ante1

    Fixed current power supply 100A DC

    You could rewind the secondary 5Volts (or 3.3V) in a computer PSU to 2Volts (or which voltage you want) and boost the rectifier circuit. You have to arrange a shunt and some feedback to the regulator circuit to obtain a constant current. There are different ways to do this but these are heavier...
  3. ante1

    component

    Hi Peron, You can almost always replace these two ICs with one ICL7107. ;)
  4. ante1

    What is a voltage regulator?

    If you’re going to power a cell phone which normally has a 3.7V pack there is some headroom. The phone probably switch of or give low battery warning around 3.2V and a topped of 3.7V pack can carry 4.65V so, between 3.2 and 4.65V will work. You might run it of 3 alkalines.
  5. ante1

    Cell Phone "AA" BATTERY Replacement...

    Put in your requirements here: http://para.maxim-ic.com/search.mvp?q=dcdc_all&an_1=Family&av_1=Switch-Mode%20DC-DC%20Power%20Supplies and you will be recommended some alternatives to chose from.
  6. ante1

    5A regulated power supply

    You could also try paralleling a few LM338 if you like, this way you don’t need as many parts.
  7. ante1

    Ball Firing Canon

    Ok, if you must go purely mechanic you must use some power which is equivalent to the work that’s needed to be done. A solenoid (plunger) needs power and I don’t know how much since I don’t have the formula clear. Are you in shortage of power to spend in this project? I suggested the propane /...
  8. ante1

    Cell Phone "AA" BATTERY Replacement...

    A circuit diagram would help, some phones have a step-up regulator right at the input and some have a step-down. It is a good start to know which you phone has.
  9. ante1

    What is a voltage regulator?

    Hi Mike, There are many kinds of voltage regulators, can you be more specific? I assume you understand the general term (voltage regulator)?
  10. ante1

    Ball Firing Canon

    Hi shaiq, You can use compressed air, carbon monoxide, or perhaps a small amount of propane (cigarette lighter gas) and an igniter. Or, you could go mechanical and do it like we discussed in an earlier thread.
  11. ante1

    Tunning

    Hi Tkil, You can use a variable resistor in a circuit with a GaAs-tuningdiode if you like. ;)
  12. ante1

    A novice in this forum

    Hi Claudio, Welcome to our forum. I’m glad to hear you find this place interesting and useful. I don’t think your English is poor; it seems to be above average among the forum members. ;)
  13. ante1

    K818a

    Only 100 Volts difference in DSS         15Volts in V(GS) …. (10 vs. 25)         I(D) …. (3 vs. 1)
  14. ante1

    0-50V 2A power supply

    Hi firfirik, Welcome to our forum. This circuit originates from an Elektor magazine (and book); I don’t remember which but its many years back. I don’t see any reason why it shouldn’t work. Hope this helps!
  15. ante1

    Download Elektor Journal Here...

    Hi shaiq, This is a DjVu file of the double issue July-August 2006 in English! ;) [attachment deleted by admin]
  16. ante1

    Valves and PC's

    Hi AJB2K3, AOpen doesn’t seem to have any interference problems with tubes in a PC! http://global.aopen.com.tw/Products/mb/ak79gtube.htm Go for it, and good luck!  ;)
  17. ante1

    how to convert ionization to readable signal

    Hi mide, What’s the wavelength and intensity?
  18. ante1

    altanatives

    Hi mide, You can’t replace an NPN transistor with a PNP! The 3055 is NPN type!
  19. ante1

    K818a

    Hi gimo, Note that 2SK818 is not exactly the same as 2SK818A which you asked about!
  20. ante1

    REQ: Electronic Circuits: Fundamentals and Applications

    Hi NanOp, Sorry I don’t have this book, but I’ll keep an eye out! The Puma needs Nuts & Volts July and August of 2006 , can you help?
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