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Type: Posts; User: mshh

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  1. Replies
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    Closed: Re: solve the problem of noise

    I don,t know what happened using those lines ? So please explain what you did.you keep telling let eagle draw gnd connections,however i already let him draw gnd i didnt interfere his job as it was...
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    Closed: Re: solve the problem of noise

    I executed line by line , the gnd plane disappeared. why did you break the power plane into two polygons?
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    Closed: Re: solve the problem of noise

    i didn't rout the gnd plane manually eagle did. i rout the signals which eagle can't do it
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    Closed: Re: solve the problem of noise

    is this a contradiction? should i do it manually on not?
    i attached eagle
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    Closed: Re: solve the problem of noise

    sorry,MCU board double layer attached
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    Closed: Re: solve the problem of noise

    I have followed your recommendations, i did separate gnd plane on double layer pcb and used capacitors. please look at the new MCU board and you will find your recommendations. the problem is still...
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    Closed: Re: solve the problem of noise

    i have gnd plane and power plane and i put capacitor 100nf across each switch also relay board is separated from MCU board.the relay board drive small ac motor(grill motor), i tried to use snubber rc...
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    Closed: solve the problem of noise

    i use external interrupt pin on atmega 8(INT1) to do action, but there is a relay and motor in my circuit which activated the interrupt and execute the action. i used switch debounce but no vain how...
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    Closed: Re: code for pacemaker device

    thanks, the problem was in do while syntax. it's working now
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    Closed: Re: code for pacemaker device

    yes, it's TM4C123GH6PM. i have already initialized the port i think it's a code problem. I used delay in software not timer.
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    Closed: code for pacemaker device

    I am trying o write a code for this emulated pacemaker device, but i couldn't i need some help. the requirement in the attached pic


    if (SW1==0x10){

    //if(GPIO_PORTF_DATA_R &= ~0x08){
    ...
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    Closed: Re: how to set and reset pin in microcontroller

    if( hour=1&minute=59)/// this will set it every 2 hours but it will reset after 1 minute when the condition is false.
    {
    set
    }
    else // when (hours=0&minute=0 or hours=1&minute= 0 or...
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    Closed: Re: how to set and reset pin in microcontroller

    the problem is i want to set and reset it every 2 hours and every state hold its value for 2 hours
    for example

    if( hour=1&minute=59)/// this will set it every 2 hours but it will reset after 1...
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    Closed: how to set and reset pin in microcontroller

    I enabled timer and i want to set and reset pin in microcontroller every two hours, how to do that? i mean i want the pin on for 2 hours and off for another 2 hours.
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    Closed: lcd display problem with unclear characters

    I have lcd 16*2 doesn't show characters clearly. to see it i have to look from sharp angle, i can't see characters when i look perpendicular. what is the problem?
    Vcc=4.3v
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    Closed: Re: ir2110 low side problem

    it worked on proteus but it didn't work on pcb
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    Closed: Re: ir2110 low side problem

    Is this reliable, or it will face problems in future?
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    Closed: Re: ir2110 low side problem

    do you have any application or schematic for your proposed connection?
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    Closed: Re: ir2110 low side problem

    pin 14 of what. which IC do you mean?
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    Closed: Re: ir2110 low side problem

    I noticed that Hin and Lin are high at the same time and low at the same time however I simulated it on proteus and they were different and it worked as expected

    - - - Updated - - -

    What do you...
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    Closed: Re: ir2110 low side problem

    signals to the driver are the same.Is this mean the 7402 ic is the problem?
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    Closed: ir2110 low side problem

    i tried t he attached circuit ,ir2110 low side output is same as high side . i saw it on oscilloscope. R13 got hot and burnt, i used the circuit without connecting the meter this is the only...
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    Closed: l293d interface MCU to relay

    relays are working on 5 v, so does the l293d.
    if the supply vcc is 5 v , what is the expected output to the relay? will it be able to drive the relay or should i raise the vcc voltage of l293d ?
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    Closed: Re: Problem with ntc thermistor and Aref

    thanks , i got it i think that the ref voltage was the problem. i changed the voltage on the thermistor to 2.5 (which is the Aref voltage ) and it works
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    Closed: Re: Problem with ntc thermistor and Aref

    Vcc is 5 v so the input value to ADC0 should be from 0 to 5v according to the temperature of thermistor
    the expected ADC conversion is different values from 0 to 1023 related to 0 to 5v
    for example...
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