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ESR meter upgrades

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    Re: ESR meter upgrades

    looks about the same as the banggood one, cant tell if either have protection diodes though.
    but the price is very good.

    i still cant understand why the chinese arent using 16MHz crystals yet.

    Comment


      Re: ESR meter upgrades

      cheers i will order one its in a kit form so will give me something too do can these be upgraded?

      Comment


        Re: ESR meter upgrades

        stj, finally got to test your 'T4 ESR tester (testing v1).zip' from page 6. Its not compatible on mine, just a blank screen.

        The ones from the russian site are not working too.

        Only after trying some more on https://github.com/svn2github/transistortester did I find 3 that displayed something except its all flipped, mirror vertically and horizontally in all ways except the right way. The one that is still readable upside down is "mega328_st7565".

        Guess I need to play with the Makefile and compile it myself.
        Last edited by bc989; 06-13-2016, 07:22 AM.

        Comment


          Re: ESR meter upgrades

          blank screen could be the contrast setting - i had that issue when i started doing this stuff.

          about upgrading,
          the biggest upgrade is probably the crystal.
          a 16MHz crystal means you can also test crystals and resonators upto about 12MHz

          other than that,
          replacing the 1117 / 7805 regulator with an mcp1702 lets you run the living hell out of the battery until it's only got about 5.6v left in it!!

          replacing a zener diode or 431 voltage reference with an lm4040 will increase accuracy.

          the other thing i'm working on - a relay that switches a cap across the socket for testing small inductors.
          sounds simple, but the cap must be stable - mine is 2%, and the relay should have a magnetic shield or it will mess with the inductor being tested.
          Last edited by stj; 06-13-2016, 08:50 AM.

          Comment


            Re: ESR meter upgrades

            so when i get mine i will take measurements of the crystal and voltage regulator and order upgrades do i need to programme the board for the crystal to work correctly?

            Comment


              Re: ESR meter upgrades

              Originally posted by stj View Post
              blank screen could be the contrast setting - i had that issue when i started doing this stuff.

              about upgrading,
              the biggest upgrade is probably the crystal.
              a 16MHz crystal means you can also test crystals and resonators upto about 12MHz

              other than that,
              replacing the 1117 / 7805 regulator with an mcp1702 lets you run the living hell out of the battery until it's only got about 5.6v left in it!!

              replacing a zener diode or 431 voltage reference with an lm4040 will increase accuracy.

              the other thing i'm working on - a relay that switches a cap across the socket for testing small inductors.
              sounds simple, but the cap must be stable - mine is 2%, and the relay should have a magnetic shield or it will mess with the inductor being tested.
              Will I be able to do all this with the banggood kit?

              Thanks.

              Comment


                Re: ESR meter upgrades

                to both of you - yes.
                the normal crystal is 8MHz, you just swap it out.

                same with the regulator and reference - although you need to check the pinouts to get the replacement the right way around.

                if you change the crystal, you need to change the software.

                Comment


                  Re: ESR meter upgrades

                  Ok for my unknown nameless Mtester clone, I got the display back by removing from your Makefile, just this one line:

                  Code:
                  CFLAGS += -DSTRIP_GRID_BOARD
                  also to stop the compiler from choking, had to change function_menu.c line 133 to:

                  Code:
                  [COLOR="Red"]uint8_t[/COLOR] function_menu() {

                  Comment


                    Re: ESR meter upgrades

                    strange, you talking about a compiler warning or a compiler error?

                    Comment


                      Re: ESR meter upgrades

                      This is what it showed, pointing to function_menu.c, so I simply changed it.

                      Code:
                      $ make
                      avr-gcc  -Wall -DWITH_MENU -DWITH_CONTRAST -DWITH_ROTARY_SWITCH=2 -DCHANGE_ROTARY_DIRECTION -DFOUR_LINE_LCD -DLCD_ST7565_H_OFFSET=0 -DVOLUME_VALUE=48 -DFONT_7X12 -DICON_TYPE=3 -DBIG_TP -DSTRIP_GRID_BOARD -DWITH_SELFTEST -DAUTO_CAL -DWITH_UJT -DWITH_PUT -DWITH_AUTO_REF -DREF_C_KORR=12 -DREF_L_KORR=40 -DC_H_KORR=0 -DWITH_UART -DRMETER_WITH_L -DCAP_EMPTY_LEVEL=4 -DAUTOSCALE_ADC -DREF_R_KORR=3 -DESR_ZERO=20 -DNO_AREF_CAP -DUSE_EEPROM -DPULLUP_DISABLE -DANZ_MESS=25 -DPOWER_OFF -DBAT_CHECK -DBAT_OUT=3 -DBAT_POOR=6400 -DBAT_NUMERATOR=133 -DBAT_DENOMINATOR=33 -mcall-prologues -DLCD_ST_TYPE=7565 -DLCD_ST7565_RESISTOR_RATIO=4 -DF_CPU=8000000UL -DMHZ_CPU=8 -mmcu=atmega328p -gdwarf-2 -std=gnu99 -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums -MD -MP -MT function_menu.o -MF dep/function_menu.o.d  -DSamplingADC -c  ../function_menu.c
                      ../function_menu.c:133:6: error: conflicting types for 'function_menu'
                       void function_menu() {
                            ^
                      In file included from ../Transistortester.h:12:0,
                                       from ../function_menu.c:5:
                      ../tt_function.h:49:9: note: previous declaration of 'function_menu' was here
                       uint8_t function_menu();   // menu for selecting extra function
                               ^
                      make: *** [../finish.mk:13: function_menu.o] Error 1
                      Fyi I'm using Atmel toolchain.

                      Comment


                        Re: ESR meter upgrades

                        what gcc version?

                        Comment


                          Re: ESR meter upgrades

                          avr-gcc.exe (AVR_8_bit_GNU_Toolchain_3.5.2_1680) 4.9.2

                          Comment


                            Re: ESR meter upgrades

                            hmm. i'm using 4.8.1

                            you need to be carefull, the newer versions create larger files.
                            upload your makefile.

                            Comment


                              Re: ESR meter upgrades

                              Yes its bigger by a bit.

                              ok Makefile attached with that 1 line remarked out and the hex/eep in case anyone with the same model as mine wants to try.
                              Attached Files
                              Last edited by bc989; 06-14-2016, 10:32 AM. Reason: attachments

                              Comment


                                Re: ESR meter upgrades

                                is the contrast right, or do you have to fine-tune it from the menu?

                                Comment

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