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  1. #21
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    Re: double volt-ampermeter with pic

    If you send me the proteus isis schematic for your circuit, I will try to code for it. You have to mention what functions it has. zip and upload the .dsn file.



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    Re: double volt-ampermeter with pic

    sure i can help you, in coding.



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    Re: double volt-ampermeter with pic

    The project at http://electronics-diy.com/product_d...oltmeter%20Kit is a 4 voltmeter. What do you want? $ voltmeter or 2 Voltmeter, 2 ammeter? Specify clearly. Do a proteus schematic for your circuit and zip and upload it so that I can write the code for it.



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    Re: double volt-ampermeter with pic

    Hey, i want one voltmeter with one ammeter, and for the line 2 i want to show the power and the Rload. I use altium Designer. I have this schematic: http://electrodb.ro/atelier/microcon...cu-pic16f876a/
    So if you understand me. Can you make a start mesage on this code? Something to Salute me when I start it?
    I am a bad guy, but I have good intentions!



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    Re: double volt-ampermeter with pic

    Here is 2 voltmeter. i will try to do 1 voltmeter and 1 ammeter. Can you draw the circuit in proteus for me. I will try to code.



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    Re: double volt-ampermeter with pic

    Man, but you have proteus? Loook this is schematic. I don`t have Proteus, only altium designer
    Look here:
    I am a bad guy, but I have good intentions!



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    Re: double volt-ampermeter with pic

    How can both sides of 0.47Ohm is connected to gnd? where is the o/p that goes to adc for current measurement? explain clearly In my version, it displays 70V as 70.00001, so only I and V can be displayed at once. so you have to use a button to scroll to next screen to view power and rload. give me the formula to calculate rload.

    Check this
    Last edited by internetuser2k12; 5th August 2012 at 12:08.



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    Re: double volt-ampermeter with pic

    0.47Ohm is conected series with load. Look here is entire project:
    http://electronics-diy.com/70v_pic_v...mperemeter.php

    Now is all clear?

    - - - Updated - - -

    The formula is U=R*I so R will be R= U/I is good?

    - - - Updated - - -

    Man I use a LCD 2x 16 chars so i can display 4 values(U, I, P, R) simultanely no?
    I am a bad guy, but I have good intentions!



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    Re: double volt-ampermeter with pic

    Check my previous post. I am not able to round off values like 65.34567 to 65.4 so it takes "V = 65.234567" = 13 characters for each value. So, I cant display 2 values on each line. Ofcourse, you can display 4 values on lcd only if you have a way to round off the numbers to 2 digits after decimal. In mikroC there is no function to round off. Wait I will try another way.
    Last edited by internetuser2k12; 5th August 2012 at 12:16.


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  10. #30
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    Re: double volt-ampermeter with pic

    So sad! maybe you can make to show with 2 digit.
    I am a bad guy, but I have good intentions!



  11. #31
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    Re: double volt-ampermeter with pic

    I have done something like this. Draw the circuit in proteus and zip and upload the proteus .dsn file. Only the power value has problem. It is displaying power/10 for power.
    Last edited by internetuser2k12; 5th August 2012 at 13:01.


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    Re: double volt-ampermeter with pic

    Is good, oke now i need to Draw that circuit or what? problem is i don`t have proteus.
    I am a bad guy, but I have good intentions!



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    Re: double volt-ampermeter with pic

    Give me your email id. I will send the link for proteus.

    - - - Updated - - -

    Just a small problem. Power is displayed as power/10.



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    Re: double volt-ampermeter with pic

    So You didn`t solve the problem with digits... 66.46 can be displayed by 66.4? with one decimal? i understan that problem don`t work but another program?
    I am a bad guy, but I have good intentions!



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    Re: double volt-ampermeter with pic

    I wrote some software to work on that volt/amp meter, To enter calibration mode press the button power up the meter release the enter button this then lets you calibrate voltage then press enter to go to amps calibration then press enter this goes back to reading the voltage/amps

    see pic below, The software can be altered to siut but still playing around with the coding will see if I can watts to it and you can even make it a 4 channel volt/amp meter. One thing I would recommend is to use a Vref and may be an op-amp to buffer the siganl to help reduce noise.
    Click image for larger version. 

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  16. #36
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    Re: double volt-ampermeter with pic

    Displaying 66.46 as 66.4 is not a problem. I am getting some wrong values if I vary the voltage and current. I am still checking it.
    Last edited by internetuser2k12; 5th August 2012 at 13:36.



  17. #37
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    Re: double volt-ampermeter with pic

    I install now proteus. I don`t understand something, will i need to draw again the schematic, if you have proteus and you have draw this schematic to make code? i don`t know how to work with proteus
    I am a bad guy, but I have good intentions!



  18. #38
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    Re: double volt-ampermeter with pic

    open the .dsn file I sent. right click edit > place components > from libraries. search and double click the component to add to the project. right click the components and choose edit properties to change the value of resistors etc., right click microcontroller and choose edit properties and in the program file select .hex file

    check these links

    http://www.youtube.com/watch?v=yt7Bhhvo-hU
    http://www.youtube.com/watch?v=J1_Dn8ip5Xs



  19. #39
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    Re: double volt-ampermeter with pic

    I verry good that, but you can change to display Values in Volts, ampers, watts and ohms(just replacind U,I,P,R)?
    I am a bad guy, but I have good intentions!



    •   Alt5th August 2012, 13:40

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  20. #40
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    Re: double volt-ampermeter with pic

    but you can change to display Values in Volts, ampers, watts and ohms(just replacind U,I,P,R)?... what do you mean by that?



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