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  1. J

    Combination Network

    so the answer is they are neither in series nor in parallel?
  2. J

    Hysteresis

    how can R2 and R3 be in parallel? Parallel resistors must have both branch out from some point in the circuit and meet up later, or is it because the output is at the same voltage as R1?
  3. J

    Combination Network

    I have attached a image, in that image is the 3.3kOhm resistor in series or parallel with the 100kOhm? My solution is, if the current flows down from the dependent source and up through the 3.3kOhm resistor, it splits at this point and goes to the 100kOhm resistor. Hence it is in parallel...
  4. J

    Hysteresis

    I have a circuit schematic like the one shown in the link. What we are doing is using Op-amps as comparators. I need to calculate the value of R3, i dont know how to do this. Can some one please advice me on how to go about it...
  5. J

    Op-Amps and General Points.

    Oh look i know that the impedance of a capacitor is 1/jwC where C = Capacitance, w = frequency in radians. I mentioned that point because you said it blocks DC.
  6. J

    Op-Amps and General Points.

    Well i know that a capacitor stores charge and is an open circuit at DC and short circuit at AC. I should be able to apply this knowledge to the circuit deduce its position in the circuit right?
  7. J

    Op-Amps and General Points.

    Thanks for that Steve, how were you able to deduce what the function of the capacitor in series with the speaker is, does it just come from knowing a lot of theory or having a lot of practical experience or both. Like i said, this is my biggest problem.
  8. J

    Op-Amps and General Points.

    Thanks Steve - this is really good information.
  9. J

    Op-Amps and General Points.

    http://www.techlib.com/electronics/audioamps.html#LM386, Head down to the LM386 Audio Amplifier Section, from reading the fact sheet i can see that when the capacitor is connected from Pin 1 - Pin 8, the gain is increased. The capacitor across Pin 7 acts as a by-pass capacitor. Pin 3 is...
  10. J

    Op-Amps and General Points.

    I can see i have caused some confusion. Steve - to your first post. I plan on using an electret microphone. Barathbushan to your first post, thanks i cant Belive i missed that :( Steve - to your second post, I didn't mean to imply that i want to build i my own i saw previous posts and the way...
  11. J

    Op-Amps and General Points.

    Thanks for the feedback, i would really like to use my own OP-AMP to do this, i can get one of the net but i want to have some experience at designing circuits (yes I am eager). Why do i need significant power output? I was just going to use an 8-Ohm speaker. In regards to the last point, i...
  12. J

    Op-Amps and General Points.

    Hi everybody I would like to design a little audio amplifier, just to help my understand Op-amp and how to use them in a practical sense. I dont really know what values of resistors to pick can someone help me. This is what i am currently thinking of. Using an Non-inverting amplifier...
  13. J

    Basic DC Circuits Analysis and Theory

    Hello All, Trying to get my head around some theory to prepare for my catch up exam on electronics stuff. Anyway, i have attached an image since in circuit analysis we assume that the voltage is the same everywhere in a wire (before we reach a circuit element), this should imply that both the...
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