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ESR meter upgrades

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    #226
    Re: ESR meter upgrades

    updated the previous post.
    Last edited by stj; 06-19-2016, 05:28 PM.

    Comment

      #227
      Re: ESR meter upgrades

      Originally posted by stj View Post
      updated the previous post.
      Thanks again i will get the kit built up and tested etc then will order the upgrades and go from there.

      Comment

        #228
        Re: ESR meter upgrades

        btw, you need a decent cap to calibrate it.
        100n - 1uf preferably film type.
        i use a 220nf polyester cap.
        you can salvage one from some junk.

        Comment

          #229
          Re: ESR meter upgrades

          cheers stj i have already got a pack of 100nf polyester caps here so willl use one of these if its ok just to clarify something each time you remove the 9volt battery do you have too re calabrate these units? (i always do but wasnt sure if needed too)

          Comment

            #230
            Re: ESR meter upgrades

            update for stj ive built the kit up as per your list bad news does not power up on pin 7 and 22 of the empty ic socket i get about 1.46v should be 5v i think? the screen does flash very quickly with the ic installed, now i dont want to start swopping resistors around etc as its really hard to remove them and leave a clear hole in the pcb the good news is the ebay seller of the kit has refunded me fully so ive just ordered a pre built kit from a diffrent store but exactly the same board revision etc so when it comes i will check all resistor values as per good working tester and the one ive built as a kit and see where ive gone wrong i did double check all the resistor values today using the hobby-hour calculator and all seems spot on with your list so will update this thread as soon as the pre built kit arrives.
            Last edited by vinceroger69; 06-20-2016, 07:26 AM.

            Comment

              #231
              Re: ESR meter upgrades

              Originally posted by vinceroger69 View Post
              cheers stj i have already got a pack of 100nf polyester caps here so willl use one of these if its ok just to clarify something each time you remove the 9volt battery do you have too re calabrate these units? (i always do but wasnt sure if needed too)
              it's saved in the eeprom.

              Comment

                #232
                Re: ESR meter upgrades

                Originally posted by vinceroger69 View Post
                update for stj ive built the kit up as per your list bad news does not power up on pin 7 and 22 of the empty ic socket i get about 1.46v should be 5v i think? the screen does flash very quickly with the ic installed, now i dont want to start swopping resistors around etc as its really hard to remove them and leave a clear hole in the pcb the good news is the ebay seller of the kit has refunded me fully so ive just ordered a pre built kit from a diffrent store but exactly the same board revision etc so when it comes i will check all resistor values as per good working tester and the one ive built as a kit and see where ive gone wrong i did double check all the resistor values today using the hobby-hour calculator and all seems spot on with your list so will update this thread as soon as the pre built kit arrives.
                short the emitter and collector on the 4673 transistor and try again - not sure what the hell a 4673 is anyway!

                Comment

                  #233
                  Re: ESR meter upgrades

                  im not sure what it is either no data sheet that i can see and the numbers rite as just checked wasnt sure wich pins to link but tried all combinatons no change hopefully pre built tester will be here soon last kit only took 9 days to arrive.
                  ive emailed all the sellers selling this version of the kit none come with part location/values etc, instructions and none will send me a picture so we can see resistor colour bands clearly i think thats why i got a refund so fast too as maybe other people buying these kits are having trouble too.
                  Last edited by vinceroger69; 06-20-2016, 08:44 AM.

                  Comment

                    #234
                    Re: ESR meter upgrades

                    short the center pin to the pin nearest the battery + lead.

                    then you should see 9v on the rightmost pin of the surface-mount 1117 regulator, and 5v coming out of the tab.

                    if you dont, check the electrolytics arent reversed and check between those points and ground for a short.
                    because frankly - there is nothing else involved in generating the 5v.

                    Comment

                      #235
                      Re: ESR meter upgrades

                      bear with me stj im going over each part ive fitted just too double check my parts ive fitted are in the correct locations etc and just nipping to get my multi meter back as was using a cheap one (neighbours borrowing my good one)

                      Comment

                        #236
                        Re: ESR meter upgrades

                        So a update with my good meter and new battery pins 7 and 22 5.01 v when hold rotary switch down bad news screen will only stay lit with no writing on screen just backlight? when rotary switch is held down no led on board lit when testing voltage or when switch held down.

                        Comment

                          #237
                          Re: ESR meter upgrades

                          i dont understand what you said!

                          what happens if you press the encoder for a second?

                          btw, the led wont light when the button is held down because of how it's wired.
                          Last edited by stj; 06-20-2016, 09:26 AM.

                          Comment

                            #238
                            Re: ESR meter upgrades

                            when encoder held down have 5v on the socket pins ok re install ic press encoder button backlight very quick flash then off.

                            Comment

                              #239
                              Re: ESR meter upgrades

                              could be cpu not running.
                              does your meter have a frequency counter?

                              Comment

                                #240
                                Re: ESR meter upgrades

                                ita a maplin meter PG017 it does say hz lo/hi

                                Comment

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