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Recent content by rokibulalam

  1. R

    20 points for suggesting a good em book

    1.High frequency & Microwave Engineering - E da Silva (Butterworth-Heinmann Publishing) 2. Engineering Electromagnetics - N.Ida (Sptinger Verlag) 3. Fields & Waves for Communication Electronics - Ramo, Whinnery & Van Duzer (John Wiley & Sons)
  2. R

    Need advice for an opamp to use

    I don't think changing op-amps will do much. It's all about the parametres of passive elements connected outside to the op-amp. 741 is very much common op-amp. you can use it. for minimizing the load effect u can use three op-amp.
  3. R

    Controlling light intensity

    u can simply use a fan dimmer
  4. R

    Simple one-stage amplifier QUESTION~

    It must be dummy
  5. R

    How to measure the characteristics of an Op-Amp ?

    Re: Measuring an Op-Amp Yes it is sure that parasitic capacitance occurs. But if the input signal is not of very high frequecy then I think there will not be any difference.
  6. R

    Help me design an op-amp for an integrator circuit in 12-bit ADC

    operational amplifier integrator Have u tried to minimize the load effect?
  7. R

    suggest a book for digital electronics

    +best digital electronic* book U can get help from morris mano, Tocci, Malvino. I prefer Taub.
  8. R

    Negative volt from positive. How ?

    You can use 7905 Ic for that purpose. It is very much stable. This is a regulator Ic. You can use up to 24v dc as the input of the 7905 Ic.
  9. R

    hidden file can not view

    hidden file cannot be shown If you remember the name of the file, then just write the name in the address bar and you will be logged in to that hidden file. Though you can access your hidden file by this way, but I sujjest you to reinstall your operating system. You may have been affected by...
  10. R

    Simple infrared controlled relay

    It will work for certain range at outdoor.

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