Recent content by aartak

  1. aartak

    Capacitor Voltage

    In order to ensure that the capacitor will not cause problems simply read its datasheet(of course if you can find it)
  2. aartak

    5ohm 20watt resistor

    Simply plug in parallel 10 resistors each 2Wt 50 ohm
  3. aartak

    Forumla for rectified and filtered voltage

    MP is right also check the resistance of secondary winding if it is more than 3-4 ohm you may have problems at high loads because 7812 needs minimum 13.5-14V to work properly dont forget to put large cap for filtering
  4. aartak

    Attenuation

    This formula is wrong it will not vork with your circuit attenuation of your circuit is 40db/decade or 12db/octave it means when you double frecuency it passes 4 time less voltage for example its module of transfer function is ~1 at 25MHz 0.25 at 50Mhz 1/16 at 100Mhz in your formula you must...
  5. aartak

    AC Voltage Regulator

    Search IRF.com there are some application notes
  6. aartak

    Need help!

    take a thermistor plug it into voltage divider. output of this divider will vary with temperature then take IC LM339(4 voltage comparators. You can find datasheet in national.com) use second divider to generate reference voltages(4 resistors in series with apropriate values) and pluge these...
  7. aartak

    How this regulator works?

    Q13 Paase negative charge to filter capacitor at every pulse of supply so regulation of charge regulates output voltage
  8. aartak

    Convert DC motor to AC power? NEED HELP

    Check output voltage of your computer board Then you can connect external DC power supply in series with in to increase sieed of motor To connect it to AC simply use transformer with apropriate woltage and diode bridge
  9. aartak

    50Hz when you touch Oscilloscope probe

    Inside Your Scope there are two capacitors vith value about 10nF connected between Mains lines and case of Scope for filtering purposes. they Create some AC voltage on Scope Common. Scope Shows voltage between common and probe. When You tuch probe You ground it by Your Body capacitance so...
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