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Type: Posts; User: LeatherNeck

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  1. Replies
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    Closed: Re: Finding X of L for an inductor

    Not there yet. Still confused.

    151572
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    Closed: Re: Finding X of L for an inductor

    Yes, thank you but I knew that one. However they do not mention any frequency in this problem.
    But I appreciate your response. I believe the next response from Akanimo is what I was missing. But...
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    Closed: Finding X of L for an inductor

    I’m very lost with this problem. I thought I knew this stuff. This is a exercise problem.
    What is the value XL in the circuit. The absolute value of Es is 100V. It says, first find Z, noting E and I...
  4. Closed: Re: Kirchoff’s Current Law. Solve node P2

    Yes, I guess its this arbitrary current direction that confuses me. I mean what you say is right because the all currents do = 0. I have to look at this again and wrap my head around it. Thanks for...
  5. Closed: Kirchoff’s Current Law. Solve node P2

    151405

    What bothers me here is that node P2 has all the sense arrows pointing into the node. I would have figured at least one would leaving the node. This is pertaining to exercise #4. I mean...
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    Closed: Re: Tricky Algebra! Help

    Oh my god. Thank you. I see it. No one at work could help me. Again my eyes were closed. They simply wanted to get it into a more useful form. I just couldn’t see it. Wow. Thanks again.
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    Closed: Tricky Algebra! Help

    RiF = hib/(Ro/RF) = RF/(Ro/hib)

    I don’t see how the hib gets in the very bottom in this equation.
    I will attach an image of the page this comes from. I can see that
    Ro/RF gets inverted, but I...
  8. [SOLVED]Closed: Re: Polar To Rectangular on the calculator, error

    Yes, the positive radius works just fine.
  9. [SOLVED]Closed: Re: Polar To Rectangular on the calculator, error

    Thanks, that is the answer. I mistakenly included the (-) in my calculation. So actually here is what I was doing,
    2.2,0deg - .15,170deg. I put in -.15 but should have been just a positive vector....
  10. [SOLVED]Closed: Polar To Rectangular on the calculator, error

    Hello everyone. I am trying to do a polar to rectangular conversion on my simple Casio fx-260 and it gives an error. Here is the Polar
    -0.15, 170degrees. No matter how I state the angle, it gives...
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    Closed: Re: White noise not being amplified

    Ok, I can do that. I believe we have a scope that can do an FFT. It would be good to know what my frequency distribution is.

    Thanks.
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    Closed: Re: White noise not being amplified

    Also, do you think I can get that low of a frequency out of the lt6003 amps used in this circuit. I feel they have set me up for failure. OMG.
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    Closed: Re: White noise not being amplified

    Yes, I am familiar with this technique. I have done that with the PWM output of an Arduino micro to modulate intensity of an LED. You are correct, the output of our circuit has a big power transistor...
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    Closed: Re: White noise not being amplified

    Ok that all makes perfect sense to me. I did look at the data sheet and, yes very small GBP. So the intent of the designer was to use a 35 watt halogen light to simulate the flame inside a gas or oil...
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    Closed: Re: White noise not being amplified

    Ok, I changed the 330k to 100k voltage divider and increased the feedback resistors to 100k and 10k with a 10uF cap to ground on R34. It is actually amplifying the signal now. There is 100mV of...
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    Closed: Re: White noise not being amplified

    Ok I’ll try higher values and provide a dc bias for the non inverting input. This was not my design, but then again, I’m not a designer so I’m careful when critiquing another engineer’s design. But...
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    Closed: Re: White noise not being amplified

    Oh yes, sorry, I actually did use the EB junction. That was the first problem I found with the circuit. So you think maybe 100K feedback resistors?
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    Closed: White noise not being amplified

    Cannot get white noise to come through this op amp. I have read that I will need to use dual supplies in this design.
    1. Do I need to use dual supply?
    2. Can this op amp pass white noise?148507
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