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Recent content by sam185

  1. sam185

    why there is 1K resistor after the capacitor? What this resistor called?

    This resistor is the discharge path for the capacitor that's why the o/p is sawtooth wave. If it is series connected then used for charging the cap.
  2. sam185

    Laptop going in hibernation mode

    Go to the My computer, now right click on the drive where your operating system is loaded & click on the property option a popup window will be opened now click disk cleanup option: from there check up for temporary hibernating files and clean it, then I think the system will never go to...
  3. sam185

    PN junction with different doping concentrations

    Width of the base doesn't expand physically- i mean the space charge(region of uncovered charge both side of junction) expands more dipper towords the less doped side as per the biasing level which is known as early effect(vb=qn(w)2/2"ep"), where w is the space charge width,q is the charge of...
  4. sam185

    PN junction with different doping concentrations

    If there is a PN junction diode with N heavily doped and P lightly doped and thiner than the N region, then more eletrons will inject on p side and the transition region will spread deeper towards the p region which is called as "punch through effect". Now in case of bjts the emitter is heavily...
  5. sam185

    My first program in Proteus for PIC18F452

    As per the choice of crystal(frequency), select the crystal mode at configure in mplab.
  6. sam185

    My first program in Proteus for PIC18F452

    Now in the MPLAB open you project & in the tool bar there is a option configure click & go to configuration bit setting ther you need to disable the watch dogtimer & select your crystal frequency and press ok & then compile your code, build it, then add the hex to the processor property in...
  7. sam185

    zero current switching

    Hi, What are you using for switching, mosfet or bjt.
  8. sam185

    14.8V to 12V,5V and 3.3V voltage regulator

    Hello, I think you can use zener diodes according to your rating.
  9. sam185

    Potentiometer interfacing with MCU

    Hi, If you are connecting a res. in series with pot there will be more drop across the series configuration hence voltage will not reach its maximum value.
  10. sam185

    Why are the saturation regions of BJT and MOSFET differently defined?

    mosfet have ohmic region while bjt doesn't. Hence mosfets i/p is voltage controlled while bjt i/p is current controlled.
  11. sam185

    [SOLVED] in pn junction ,relation bet. 'storage delay time' &'carrier life time' and frequency

    Re: in pn junction ,relation bet. 'storage delay time' &'carrier life time' and frequ Yes Storage delay time and carrier life time depends on frequency and the concept is based on transient and diffusion capacitance concept for diode (T=1/F). Energy-storage components
  12. sam185

    50hz switching transistor

    can you be more specific, about the application.
  13. sam185

    50hz switching transistor

    yes why not.
  14. sam185

    [SOLVED] modelsim---the testbench for user define primitive

    Go by this process: 1) Copy your code in a text file. 2)close modelsim. 3)Open a working program by double clicking its source file that you have saved in its directory. 4)copy the code from that text file where you saved. 5)Then overwrite the code over the running code by deleting it. 6)save...
  15. sam185

    Help regarding ir remote decoding

    The ir leds will operate in a certain range of frequency between 34-40kHz pulse.

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