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Type: Posts; User: wwfeldman

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  1. Closed: Re: How to do power measurement in LT SpiceXVII

    measure the voltage and current on input and output
    use the "add a trace" function in graphical output display to find V * I on input and output

    power in should be > power out
    and this should...
  2. Closed: Re: Please what is the maximum speed of a user at which 1. GSM can perform and 2.CDMA

    in this article

    https://www.pcmag.com/news/300986/cdma-vs-gsm-whats-the-difference

    the speeds are noted in this quote from the article:

    "Since its inception, GSM has evolved faster than...
  3. Closed: Re: LTspice...splitting LT1243 output into two separate pulse streams

    maybe a part designed to do what you want
    rather than forcing a square peg into a round hole

    if you want to build this, you'll need to add a variety of hardware to make it work
    including high...
  4. Closed: Re: LTspice...splitting LT1243 output into two separate pulse streams

    the rising edge of the LT1243 clocks the DFF, s both transistors "switches" are on at the same time -
    one turning on and one turning off

    shouldn't QQQ and QNOT go to the switch controls, SSS and...
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    Closed: Re: Solve Equations Verilog

    in post 1, its a^7, in post its x^6 ?

    the number of roots is equal to the highest exponent, so 7 roots and 6 roots, receptively

    if all you want is a solution, then use Wolfram Alpha
    type in...
  6. Closed: Re: LTspice...splitting LT1243 output into two separate pulse streams

    please show how you want to connect/use the D FF

    i expect you'll need to connect the current sense

    i would suggest a half bridge controller, maybe even with a high side driver built in
    maybe...
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    Closed: Re: Flow of Current in IGBT

    current path through IGBTs looks ok
  8. Closed: Re: Confusion with relating the sensor output voltages from its datasheet

    data sheet page 3:

    Sensor Input Measurement range (typical) +/- 3.6g

    Sensitivity (typical) 300 mV/g

    Zero g Bias Level (typical) 1.5 V

    These tell me that an output of 1.5 V means no...
  9. Closed: Re: Arduino based irrigation controller misbheaving at a particular site.

    the surge protector will make a difference only if one or more of the MOVs are bad (low resistance or shorted)

    are you using the same 24VAC 1A plug pack at home and at the "bad" location?

    if...
  10. Closed: Re: Arduino based irrigation controller misbheaving at a particular site.

    "The 3A DC to DC converter keeps shutting off due to the thermal over load protected being triggered."

    what is it designed to use as input?
    check that the bad location has that input

    I blew...
  11. Closed: Re: how to determine the resistance of a running circuit

    assuming your device has a power input and return, you can measure the voltage across those inputs
    to measure the current, you need to disconnect the return and put in a resistor and measure the...
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    Closed: Re: Proteus PCB Component Problem

    see this thread components are stick together in pcb document
    it started on November 12
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    Closed: Re: What do you know about ANSYS Medini?

    did you google ANSYS Medini?
  14. [SOLVED]Closed: Re: Average vs RMS load-current for LDO design

    in post 4, you said there are 10 identical digital blocks your LDO regulator is powering

    if you have the current waveform for one digital block, since it isn't DC, use RMS to find a measure of...
  15. [SOLVED]Closed: Re: Average vs RMS load-current for LDO design

    I would size this LDO pass element depending on desired Vout, say 5V, drop out voltage, say 1V, so i need at least 6 V in
    the current requirement has to be the maximum current the load will draw....
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    Closed: Re: Processor overheating

    now that its not summer, is it working ok?

    the water cooling idea works if the case is sealed for water
    you may want to look out for condensation inside if the water cooling is cool enough,...
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    Closed: Re: 1MHz Timer Settings at STM32F767

    so 108MHz/107+1 translates to 108MHz/108 ?
    if so, just use 108, not 107 + 1

    if it isn't 108MHz/108, then it looks like (108/107) + 1 = 1.00934 +1 = 2.00934 ?

    108 MHz / 2.00934 = 53.7488 MHz...
  18. Closed: Re: output changes when I touch the enclosure

    i see two possibilities

    by touching the enclosure, you have somehow reduced the pressure and so the current goes down
    0.04 mA is likely well within the design margins of the pressure transducer...
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    Closed: Re: resistor value and power calculation

    in the absence of a schematic, i assume the the load is in series with the resistor in series with the battery
    therefore, your circuit looks like a battery with two resistors, all in series

    the...
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    Closed: Re: Processor overheating

    first, put it in the shade

    then put a fan on the hot spot
    there is some spot somewhere on the case that is warmer than the rest.
    it may not be easy to find, so put a fan on it

    put it on some...
  21. Closed: Re: Regarding UC3844 IC used for PWM switching

    kindly show the entire schematic

    the missing stuff to the right likely has a connection for Isense
    that will aid in answering your question
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    [SOLVED] Re: Why is CO2 a green house gas?

    i am not an expert in geophysics, atmospheric physics, ocean chemistry and physics etc etc
    and i doubt you are

    i have yet to hear from any source that the sun is behaving differently in the last...
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    Closed: Re: 1MHz Timer Settings at STM32F767

    i am not very familiar with STM32F767



    please explain notation 108-1 and 2-1 in
    calculation prescaler should be 108-1, and a counter period 2-1.

    please explain your calculation that got you...
  24. Closed: Re: How can we simulate M/M/1 /∞ using C programming

    i do not understand your notation

    please explain M/M/1/infinity?
    and for completeness sake, please explain "includes AVG. waiting and no. of customers ? "
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    [SOLVED]Closed: Re: digital integrated circuits

    i do not see a question
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