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Type: Posts; User: gary36

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  1. Replies
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    Closed: why does optcoupler behave like this?

    Just bread boarded 4N35 circuit. Input side 5V, 330R on anode. Cathode side grounded. On transistor side, collector connected to +24V. Emitter connected to 10K resistor to ground. Everything works...
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    Closed: Re: EMI/EMC Compliance scheme

    Looked at references. For protecting 5V DC line, I chose SMAJ6.0A. The clamp voltage suggests 10.5V at Ipp. But max rating for 5V devices are 5.25V. Suggest me the right solution
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    Closed: Re: EMI/EMC Compliance scheme

    Hi Easy peasy

    Some calculation tips would be helpful to choose the right TVS.
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    Closed: Re: EMI/EMC Compliance scheme

    Hi Easy peasy
    Recently my customer told me that even though the power supply claims to be compliant to surge and EFT, still it is mandatory to provide basic protection for the DC line connected to...
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    Closed: Re: EMI/EMC Compliance scheme

    Hi
    Curious, but can EMI filter (as I proposed) withstand surge (2kV level) and EFT burst transients? The data sheet FN2030,https://www.schaffner.com/product-storage/datasheets/fn-2030/ does not...
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    Closed: Re: EMI/EMC Compliance scheme

    Hi Easy peasy

    Sl.No2 requires additional investment, whereas Sl. No.1 is bit cheaper. So I am asking whether Sl.No.1 alone would suffice or should I really go for additional investment?
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    Closed: Re: EMI/EMC Compliance scheme

    Hi Easy peasy

    Please confirm, which one to choose,Sl.No.1 or Sl.No2 as described in #1?
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    Closed: EMI/EMC Compliance scheme

    I am developing a system which is powered by 230V/AC. I am using a AC-DC converter (230VAC to 3.3V/2A-max) to power on board components. I have to make this product EMI/EMC compliant as per IEC61000...
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    Closed: Status of time delay relay

    is there a way to set the time of a time delay relay remotely?(using MCU)
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    287

    Closed: frequency response plot

    Seeking method to plot and examine the single bin frequency response of DFT. Looking for matlab code or suitable references
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    Closed: Re: writing a program within ISR

    Hi

    Can ISR handle large program? Should we declare all variables within ISR static?
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    Closed: Re: writing a program within ISR

    Hi andre

    Do you feel the strategy adopted in #5 is incorrect. Will it not synchronously execute within the interrupt time period? Secondly I have seen sample codes using static double variable...
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    Closed: Re: writing a program within ISR

    Hi
    would the following strategy work. I think I can ensure that I do not load ISR

    void _ISR _T3Interrupt(void)
    {
    IFS0bits.T3IF = 0;
    flag=1;
    }

    while(1)
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    Closed: Re: writing a program within ISR

    Hi andre
    can you give details on my queries posted in #1
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    Closed: writing a program within ISR

    Hi

    I am implementing a PID controller and want to execute PID algorithm within an ISR. I have used the timer to trigger the interrupt . My problem is that how to keep ISR program small and how to...
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    Closed: Re: PI controller settings

    Well , not an ohmmeter. Some other method to detect resistance change in situ
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    540

    Closed: PI controller settings

    I am building a analog PI controller for experimental purpose. I have variable POT for P and I controller. I would like to know how much the value of R has changed in P and I . How to do it?
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    Closed: PLL Mode check in dsPIC33

    Hi

    I am currently using dsPIC33EV256GM106 and trying to experiment with the performance with and without PLL. My XTAL is 8MHz. I was trying with primary clock as well as FRC mode to compare the...
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    [SOLVED]Closed: Re: pickit-3 not connecting

    Hi

    Problem is resolved. Found a solder bridge between PGC and PGD.
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    [SOLVED]Closed: Re: pickit-3 not connecting

    Hi

    Checked all the above factors and found compliance. Can it be defective dsPIC?
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    [SOLVED]Closed: pickit-3 not connecting

    Hi

    This is a typical problem where I am unable to connect my custom board dspic33EV256GM106 to PIC -KIT3. I have searched all over the web and checked my schematics, continuity on board and...
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    Closed: Isolated vs Non Isolated DC-DC Converters

    Hi

    I have an application that requires +/-15V power supply for set of op-amps that consume in total less than 10mA (using low power op-amps)
    I have only 5V power supply on board. I was exploring...
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    Closed: Re: integrator wind up in a controller

    Hi

    The question is different. Based on the requirement, speed is settable from 0-100 RPM. 100 RPM is max speed of the motor. let us say we set the speed for a particular process to be 20 RPM. For...
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    Closed: Re: integrator wind up in a controller

    Hi asdf44
    What would happen if my set speed is 20 RPM and due to feedback failure, speed jumps to 100 RPM. How to prevent that?
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    Closed: Re: integrator wind up in a controller

    Hi

    I am just trying to understand wind up in the context of speed control system of a dc motor . I do not have any problem or design in my mind.
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