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ESR meter upgrades

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    Re: ESR meter upgrades

    Originally posted by vinceroger69 View Post
    Thanks for the update at least its not just me having issues with these kits from this seller im in the same situation as you at the minute just trying to find the correct firmware for it (i havnt had time too look for more at the moment though) this thread from eevblog has a lot of firmware for these testers and is well worth a read, stj and myself have posted in this thread but i have not asked for help regarding the firmware as yet.
    http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/
    I have just posted in eevblog too as they maybe able to offer some help too i will try all your latest files later stj when i get back home many thanks again for your help.

    Comment


      Re: ESR meter upgrades

      mega328_st7920
      testing-1306.zip
      testing-dogm.zip
      The above three behaved like it also did with "testing.zip" which was blank screen.

      testing-ramshift.zip
      testing-oc.zip
      The above two behaved like it also did with "GM328A ESR tester (SVN663).zip" which was scrolling characters on the screen.
      "The one who says it cannot be done should never interrupt the one who is doing it."

      Comment


        Re: ESR meter upgrades

        Originally posted by Per Hansson View Post
        mega328_st7920
        testing-1306.zip
        testing-dogm.zip
        The above three behaved like it also did with "testing.zip" which was blank screen.

        testing-ramshift.zip
        testing-oc.zip
        The above two behaved like it also did with "GM328A ESR tester (SVN663).zip" which was scrolling characters on the screen.
        Thanks for trying all the firwares above ive just updated the eevblog one and said there recommended one didnt work i would if i was you contact the ebay seller and tell them the issues as i got a partial refund on mine and kept the kit since then i have brought a identical pre built kit that works fine but i cant read the atmega328p ic with my promini tl866 programmer all i get is a whole screen of ff s as no data on chip although it maybe protected somehow hence wont read.

        Comment


          Re: ESR meter upgrades

          Here is a picture of my meter assembled.
          It was impossible for me yesterday night to see the color bands so I measured the resistors and put them in according to stj's nice reverse engineered component schematic.
          That said it's of course possible some of the resistors are 0.1% while some could be 1%, so no warranties there

          I now tested another firmware: mega328_st7565 but the screen was blank with that as well.
          EDIT, not blank: https://www.badcaps.net/forum/showpo...&postcount=463
          Do note that our LCD has 9 pins, I note that most other testers use LCD's with a parallel connection and much more pins?
          Attached Files
          Last edited by Per Hansson; 07-31-2016, 04:06 AM.
          "The one who says it cannot be done should never interrupt the one who is doing it."

          Comment


            Re: ESR meter upgrades

            the lcd actually uses 4 pins.
            clock,data,enable and select.
            enable is probably permanently grounded.
            it *should* be SPI, but i may try I2C instead.

            Comment


              Re: ESR meter upgrades

              Originally posted by Per Hansson View Post
              Here is a picture of my meter assembled.
              It was impossible for me yesterday night to see the color bands so I measured the resistors and put them in according to stj's nice reverse engineered component schematic.
              That said it's of course possible some of the resistors are 0.1% while some could be 1%, so no warranties there

              I now tested another firmware: mega328_st7565 but the screen was blank with that as well.
              Do note that our LCD has 9 pins, I note that most other testers use LCD's with a parallel connection and much more pins?
              this is my assembled tester i have checked the resitors against my prebuilt unit and they all match fine ive posted again on eevblog too see if they can help.
              Thanks for updating the eevblog thread too as you can explane things better than i can and im still learning to use my programmer so with you testing the firmware too is good as i maybe making mistakes just to note the kit i brought was from one ebay seller but the pre assembled kit came from another seller although i cant see that making any diffrence as they identical units.
              Attached Files
              Last edited by vinceroger69; 07-14-2016, 11:26 AM.

              Comment


                Re: ESR meter upgrades

                o.k.
                after looking at the pcb foto's again,
                i'm damn sure they are using a 7565 type display and PD0-3 on the cpu.

                so i'm now working on the theory that they have swapped over some of the display wires for some reason.

                everything else about the board is the same as the generic schems.



                so test this - swapping the clock and data pins.
                Attached Files

                Comment


                  Re: ESR meter upgrades

                  I will try your file as soon as im home stj ,madires on eevblog has said
                  Since the tester stays on it's clearly a display problem. The first thing is to identify the display controller and then the pinout.
                  how do we find that information out?

                  Comment


                    Re: ESR meter upgrades

                    Ok, short update.
                    I did contact the seller and he actually got back with a decent reply.
                    I quoted it below, the linked schematic seems to be correct.

                    I tried both the linked "Original.zip" firmware, that did not work. (Blank LCD).
                    The author of that post talked about it being the mega328_color_kit so I tried that firmware too, but no dice, just blank LCD again...
                    EDIT: Forgot to add that in the "Original.zip" the firmware itself seems ok.
                    But the Data.hex file is really different, it contains the menu options in clear text instead of fonts it looks like to me?
                    Also it includes a Config.hex which is for the fuses but I'm not sure how to convert that to the values I would need.

                    Finally stj I tried your testing-swap23.zip firmware but that also just resulted in a blank LCD...

                    Dear,Good buyer
                    hi . please open the link download data .thank you

                    have a great (nice) day
                    best regards


                    You can get the program data from address:

                    Just download the file Original.zip .
                    Last edited by Per Hansson; 07-14-2016, 01:31 PM.
                    "The one who says it cannot be done should never interrupt the one who is doing it."

                    Comment


                      Re: ESR meter upgrades

                      Thanks per hansson and stj for trying as well to find the firmware etc as per madires message on eevblog i guess thats our next step as in, The first thing is to identify the display controller and then the pinout, but how do we find this information out is it worth removing the lcd from the pcb and seeing if that shows anything usefull.

                      Comment


                        Re: ESR meter upgrades

                        unlikely that it's got clear markings on it, but you never know.
                        the cpu as i said is using PD0-3, so just need to find how they go to the lcd.

                        i will make a few more versions later.

                        Comment


                          Re: ESR meter upgrades

                          test
                          Attached Files

                          Comment


                            Re: ESR meter upgrades

                            Originally posted by stj View Post
                            unlikely that it's got clear markings on it, but you never know.
                            the cpu as i said is using PD0-3, so just need to find how they go to the lcd.

                            i will make a few more versions later.
                            The schematic "4660.pdf" linked above in my previous post is correct.
                            Of course I don't know if that matches internally with the LCD itself.
                            But I have atleast checked that the wiring to the LCD header is as the schematic shows

                            I tested your version above but it was more of the same: only backlight.
                            Just to make sure I again reflashed your old firmware from this post.
                            And I did get the scrolling text as shown in my picture here.
                            (Just wanted to make sure nothing else had happened).

                            EDIT: can't the problem be with the fuses?
                            Last edited by Per Hansson; 07-15-2016, 01:44 PM.
                            "The one who says it cannot be done should never interrupt the one who is doing it."

                            Comment


                              Re: ESR meter upgrades

                              This looks like the exact screen used on these testers theres a pin out included dont know if this helps but thought i would post it

                              Comment


                                Re: ESR meter upgrades

                                no, i'v seen a few of these panels lifted - they are more like this:
                                Find many great new & used options and get the best deals for 12864b+128x64+Dots+Matrix+Graphic+LCD+Module+Display+Screen+Green+Backlight+LCM at the best online prices at eBay! Free shipping for many products!


                                the question is how that ribbon maps to the pinstrip on the backing pcb.

                                Comment

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