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Home Made Osciloscope

Discussion in 'General Electronics Discussion' started by djradu, Oct 8, 2012.

  1. djradu

    djradu

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    Oct 5, 2012
    I guess that once one gets more knowledge in electronics,the need for more equipemant is bigger , but why pay some over rated company product when you can have it yourself done.I have an 10 MHz osciloscope but i need one for the road, a portable one so i kindly ask for your advice and knowledge what kind and how to build one ! Sorry if i posted in the wrong place !
     
  2. BobK

    BobK

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    You could probably build a scope with a bandwith of about 100Khz using a microcontroller, a few opamps and an LCD display. Getting over 1Mhz would be much more difficult.

    Bob
     
  3. djradu

    djradu

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    Oct 5, 2012
    Thanks bob,guess it is a good start,a good thing fo audio measurement,wen repairing audio at neighbours or at frinds , relatives on the road. For start lets begin with the display,wath kind would you recomend and what woluld be the circuit for it,sorry about my english !
     
  4. amidis86

    amidis86

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    Jul 17, 2012
  5. djradu

    djradu

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    Oct 5, 2012
    amidis86 Thank you,i have never tried it and its kind of expensive for me now , i understand you tried it and failed well why dont you give it another go ?
     
  6. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

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  7. wingnut

    wingnut

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    Aug 9, 2012
    What do you think of the PICkit 3?

    On the subject of free oscilloscopes, Winscope works OK (turns the pc into an oscilloscope).
     
  8. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

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    I'm not familiar with it but CC or Bob might be. I definitely know that CC is into Pics.

    Chris
     
  9. BobK

    BobK

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    So is Bob :)

    The PICKIT 3 still seems to be plagued with problems. I don't have one, I am still using my PICKIT 2 that I have had for about 5 years now without any problems. The only problem with PICKIT 2 is that it does not necessarily work with the latest PIC chips. If you need one of these newer chips, the PICkit 3 will be necessary, especially if you need debugging.

    Bob
     
  10. wingnut

    wingnut

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    Aug 9, 2012
    Thanks Bob

    I did not realise the PICkit 3 had teething problems.
    I am wanting to upgrade from my old PIC programmer which does not have in circuit programming nor does it take modern PIC's. I will probably just stick with Arduino Uno for now.
     
  11. CocaCola

    CocaCola

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    As everyone will attest the PICKIT3 has issues, and you can pick up a 'bootleg' PICKIT2 cheap enough that will still work just fine for a vast majority of the chips...

    My primary 'stand alone' or 'in circuit' PIC programmer is the Melabs U2

    http://store.melabs.com/cat/u2.html

    But, for most of my stuff I program using the on board programmer on either the

    QL200 developer platform
    http://www.pic16.com/en/wzcapi/ql200.htm

    or the

    Mikroe EasyPIC developer platform (they also have dsPIC and PIC32 versions)
    http://www.mikroe.com/easypic/

    As for a DIY osciloscope, look at the DSO Nano, I have the version 1 back when it was in a recycled MP3 player housing, the new version is much cleaner... It's open source so if you really want to you can tweak the firmware to your needs or just use it as is... It's nothing fancy but for under $100 it's a neat little pocket device...
     
  12. BobK

    BobK

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    I really like my in circuit programming, because I break a lot fewer pins that way. :)

    Bob
     
  13. CocaCola

    CocaCola

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    Apr 7, 2012
    That is why I do a lot of the development on the larger developer boards above, that way I can program in circuit with the built in programmer without a hiccup... I also replace the stock cheap socket with ZIF sockets on the developer boards, even easier and less pin damage...
     
  14. djradu

    djradu

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    Oct 5, 2012
    Last edited: Oct 16, 2012
  15. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

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    Read the Picaxe data and download the free software. Picaxe doesn't require any programmer hardware other than a serial cable and a couple of resistors and a diode.

    Chris
     
  16. djradu

    djradu

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    Oct 5, 2012
    CDRIVE Thanks,but since im not so much into uC could you help out with a schematic,thank u ! :)
     
  17. CocaCola

    CocaCola

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    If you want to see how the in circuit programing of the PICaxe works just visit their site they have it all clearly documented... The advantage they leverage is that they use the computer as the programmer vs an external device, this is possible due to the fact that the PICaxe has a pre-installed bootloader installed when you purchase it, that allows for this type of in circuit programming without additional hardware... You can do the same with normal PICs as well but you will need a hardware programmer to first load the bootstrap/bootloader into the chip, after that it can be reprogrammed without the need of the hardware programmer, PICaxe does this initial loading for you...
     
    Last edited: Oct 16, 2012
  18. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

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    May 8, 2012
    Ditto to what CC said but what schematic are you talking about?

    Chris
     
  19. djradu

    djradu

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    Oct 5, 2012
    @COCA COLA and @CDRIVE Thank you,i mean the programer board schematic !
     
  20. CocaCola

    CocaCola

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    Apr 7, 2012
    As I said it's all documented on their site, no need for me to copy and paste it here just go there and read it...
     
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