i need a pic programmer....

Discussion in 'General Electronics Chat' started by leonheard, Jan 24, 2013.

  1. leonheard

    Thread Starter Member

    Jan 8, 2013
    48
    0
    i need a pic 16f84 programmer, i dont have a standart rs232 com port neither a printer connector in my pc, but i bought a usb to rs232 serial converter, ( i read in some forums that it wont work in programming ) not sure about that.

    can u give me some links for a simple or advance diy programming schematics?

    it doesnt need to be veeery good, just some basic so i can learn more about pics, and stuff...


    thanks
     
  2. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    What happened to the other one you mentioned here?

    Save yourself the trouble you will undoubtedly have and get the Pickit....
     
  3. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,887
    1,018

    Looks like lionhead is being bullheaded. :)
     
    tshuck likes this.
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    Get a PICKit 2 and save everybody, mostly yourself, a TON of headaches.

    (Spinnaker will suggest a PICKit 3, but when you need a 3, you'll probably want features from both anyway)
     
  5. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    Let him build a RS232 programmer if he wants to.

    Look for a schematic which injects 12V externally, and then do that, either with a wall adapter (pretty dumb for 1mA), or with batteries.

    Use a joulethief to generate the 12V :)
     
  6. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    We have no ability to prevent him from building it if he so chooses, but since he asked, we are attempting to give him a solution for what we feel is a better solution, especially considering that the USB -> RS-232 converters don't usually work for these things....
     
  7. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    How can they work? These old PICs need 12V programming voltage.
    It's not that difficult however to build a RS232 programmer.

    The PICKIT3 costs about $50.

    We don't know the OPs budget and what he wants to do with 16f84A

    It is not a good PIC in my opinion, even if you can build some simple circuits with it.

    Get a 16f1824 or 16f1827 or better a 18F chip.
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    12V boost converter.

    The OP will spend more in components and shipping than a pickit 2 clone...
     
  9. DerStrom8

    Well-Known Member

    Feb 20, 2011
    2,428
    1,328
    I agree with the others. I HIGHLY recommend just buying a PICkit2. It's a cheap one-time cost of $35 and it'll last you for YEARS. I was like you once--didn't want to spend money on a programmer and wanted to build my own. But then I decided to buy a PICkit2 and it was DEFINITELY worth it. I can't recommend it more. Even if $35 seems like a lot right now, since it will last you a long time it will actually save you money. My recommendation? Just buy it. It's the best thing you'll ever do.
     
  10. leonheard

    Thread Starter Member

    Jan 8, 2013
    48
    0
    hahaha sorry if i bother you guys xD am just so interested in electronics, and i have money, but i wanted to build it myself ( dunno it makes it more interesting and i learn more about it :D ) i will try few times to do it myself, if i dont succeed then i will buy that ggoddamm pickit2 xD thanks for ur comments/ time and help.

    have all a nice day ;)
     
  11. takao21203

    Distinguished Member

    Apr 28, 2012
    3,577
    463
    OK here it is shown how to supply Vpp externally:
    http://www.pablin.com.ar/electron/circuito/mc/ppp/index.htm

    Of course doing it that way is bad. You do not need 7805 or any power supply.
    Use the regular RS232 circuit. You only need to supply 12V at 1 mA.

    Take for instance this jouletheif circuit. It works without a transformer. One BC327 or 2n3906 is used. It is not difficult to build.

    Here also some JDM circuits. You have to invert Vpp. And you do not need a transistor neccessarily. I did not use one in my design.
    http://perso.wanadoo.es/pictob/jdm.htm

    My reason was the same, I just wanted to do it for exercize purpose. Took me some hours!

    I also have switch on the programmer, so I can use the jouletheif to power the circuit as well. It produces 14 volts or so, but the voltage goes down if it is only loaded with a few mA. The PIC isn't destroyed because it has clamping diodes, and they will only conduct a few mA.
     
  12. nigelwright7557

    Senior Member

    May 10, 2008
    487
    71
    I use a PICSTART, its rs232 and pretty old but it works very well and there is not setting up just put pin 1 of the pic to pin 1 of the ZIF socket and it works.
     
  13. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,887
    1,018
    Buy a pickit 3 and then build a pickit 2. There is a clone of a pickit 2 if you search. It is supposed to use the Microchip code.

    Then you will have built your own and have best of both worlds a Pickit 3 and PicKit 2.
     
  14. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    The Pickit 2 schematic is pages 81 & 82 here
     
Loading...