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  1. #1
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    PIC18f programmer circuit

    Asalam-o-Alikum....!!

    i am interested to make programmer for PIC18f, although i don't know much about pic18f458 and programming too .but in this semester this subject will be offer.so i am trying to study this, specially making understanding with programming.

    http://www.radiolocman.com/shem/sche....html?di=54951
    this is the link where i see the programmer circuit.i want to ask that it will work??

    i should make PCB of this ???

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    Re: PIC18f programmer circuit

    As you are starting now and meant for future, better you make or buy one PICKIT2 or 3. This programmer works with usb.
    As time passes , you don't see COM ports anymore.
    It is not indicated where you are from.
    If , from India, i can offer a ready PICKIT2 fully working version. If from any other country, I can offer the pcb artwork and parts list.
    It is already there elsewhere on this very site, in a post started by computerman29



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    Re: PIC18f programmer circuit

    @mvs sarma , i am from pakistan.
    i can make PCB, if you provide me layout and component list.



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    Re: PIC18f programmer circuit

    Well , i could not manage y day to upload the files. First you need to find a way to load the firmware into 18F2550 using a known good programmer from any friend or from college. Try to procure special components like SMD MOSFETS to replace BS170 and BS250 as they are problematic. Also you need to procure one Rail to rail Opamp like MCP601, MCP6271 or MCO6281 of microchip make in dip8 package. you may not need to use solder mask. component overlay helps proper placement , just.

    here are the files.

    All the best



  5. #5
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    Re: PIC18f programmer circuit

    in my country SMD components are not available in market..
    what is the solution of it...??
    have you made this by own???
    i will start this step by step .
    first i will made the PCB and drilling that i do after this week..
    and it will be good thing to share on fourm about problem that new member should not have any problem about this.
    but i need your to complete it..

    is it possible that you provide me Gerber file.???



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  6. #6
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    Re: PIC18f programmer circuit

    I don't have the gerber files., neither i know how to make from Eagle. I generally home brew using toner transfer .
    perhaps you have to get smd from ebay or some such sources.
    we had some issues with BS170 (n mosfet) and BS250(Pmosfet) especially at U5P .Perhaps no point in making the board alone unless you have proper resources.

    you may try a simpler COM port based schematic with external 12V supply, whereby perhaps you dont need the 7812 regulator and the diodes used there.
    . this design is done by a HAM with call sign DL4YHF, we made this and works. instead of using 18 pin socket
    just try to use ICSP pins as indicated in the first diagram.

    Again, perhaps you dont need the 7812 regulator and the diodes used there. it becomes more economical.

    all the best



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    Re: PIC18f programmer circuit

    it would be a difficult for me to purchase components from ebay..because i am student and pocket money is not so good.
    i want to use available sources that are available in my country.
    otherwise instead of taking headache of making ,i prefer to purchase PIC KIT2.
    i think you should understand what i am saying.

    it will support PIC18f .?????
    if you dont have gerber file ,no problem.
    please provide me PCB layout which is good to program PIC18f452 or PIC18f458.



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    Re: PIC18f programmer circuit

    if you are shifting to make one design by DL4YHF. i can send the artwork of eagle on pdf otherwise the eagle files

    even the DL4YHF can be used to program the chips you referred. Only issue you need to have external regulated 12V DC



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    Re: PIC18f programmer circuit

    i can make 12v fixed or regulated power supply..
    you provide me PCB layout..
    but the main thing is that it should work...
    i will work step by step and show you through .JPG that what i does and what i am doing.



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    Re: PIC18f programmer circuit

    hi,

    Pickit2 supports the two processors you listed. You can buy it (or a clone) off ebay, or microchipdirect, but i don't think it's worth it. If you're going to spend money on that, buy the newer version, pickit3,. However, if you want to build it, i would suggest "szilva clone", i built it 4 years ago, plugged it in, it worked. Hasn't given me any headaches eversince.

    pityu



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  11. #11
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    Re: PIC18f programmer circuit

    hello @pityu
    szilva clone support 18f ???
    it will better for me to make it own. please provide me PCB of this...
    i want to make it as soon as possible.
    because my aim is to be good programmer and assemble my project with hardware in good manner.
    in simple words,i am interested with PIC controller..

    best regards.



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    Re: PIC18f programmer circuit

    Okay, unfortunately i don't have the files anymore, and apparently the project from www.mcuhobby.com was taken off as well.
    However, i found on google its schematics:
    http://www.hairyraho.com/assets/Samp...ch.png?r=55667
    and the pcb in png format.
    http://enidion.ath.cx/pk2/pk21-mod-brd3.png

    you can re-route the whole thing to look exactly like this.

    pityu



  13. #13
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    Re: PIC18f programmer circuit

    @pityu ,
    i would be difficult to design again in and reroute..
    i think it will be time consuming.if possible then kindly provide me PCb layout.it would be helpful and time saving.
    it would be difficult to design and test and then PCB..



  14. #14
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    Re: PIC18f programmer circuit

    the MCUhobby based PCB is equally costly with components like IRF9xxx etc.
    If you can afford that you can afford PICKIT2 itself as homebrew, as the circuit is mostly unchanged.
    please try out the DL4YHF design. here are the artwork etc



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    Re: PIC18f programmer circuit

    http://www.circuitvalley.com/2011/07...ochip-pic.html
    http://http://tomeko.net/pickit2.php?lang=en
    http://simon.derr.free.fr/site/spip/spip.php?article11

    i search these..what you say about these????
    which should i made and cheap...
    download PCB layout and check..
    Last edited by internetuser2k13; 13th August 2013 at 06:16.



  16. #16
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    Re: PIC18f programmer circuit

    I think you need better programmer then your plan...
    dont spend time, buy PICKIT3,
    also I attach for you detailed explanation about pic programmer from mikroe.com,
    read this,
    best regards



  17. #17
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    Re: PIC18f programmer circuit

    This goes down to how fast you want to get started, i guess. If you need it quick, build the simple version. If you have the time, building a widely used and tested version would be the better way to go.
    edit: please, for your own sake, do NOT build a programmer that works on serialport.
    pityu
    Last edited by pityukecske; 13th August 2013 at 12:06.



  18. #18
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    Re: PIC18f programmer circuit

    thanks for the comments. :)
    dear Experts...!!!
    i have only RS.1000 , in this amount how can i purchase a programmer.
    in this amount i think it would be a good decision to build it own.because the component will be easily purchased in this amount.and i will purchase controller in next month.hopeful.
    its true that i want to start as fast as programmer is build.
    now a days i am studying books for PIC controller (Muhammad Ali Mazidi book),

    i see on this fourm that i asked for add as a friend. what does it mean by adding friend ??? is it just like facebook??? to chat with friend or pass comment in the post.
    kindly tell me about that.

    and at last
    "i dont know whether i should use simple programmer or high level (as i am beginner), i want to build and want to start work."



  19. #19
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    Re: PIC18f programmer circuit

    The programmer designed by DL4YHF has been built by me and many of my friends and works without issues.
    it outputs icsp connections.
    one has to take pain like pickit2, to connect it using a breadboard to program a chip
    in-situ, perhaps it can do. i have one with me and i use it now and then to test
    i use www.winpic800 program and define my programmer as if it is JDM, but it has external 16V dc supply input and uses a regulator. as we can manage with out regulator , i use pre-regulated 12V dc .



  20. #20
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    Re: PIC18f programmer circuit

    @mvs sarma
    so you prefer to build DL4YHF ...???
    then i am making this..it appreciative
    Thanks....!!!!

    but i have to start on 18-8-2013, any other idea's will also be appreciative.
    because i will go to next city to purchase components.



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