Announcement

Collapse
No announcement yet.

Series light bulb trick

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Series light bulb trick

    Hi,

    I'm using with success the "Series light bulb trick" in many circuits - troubleshooting.
    And have 15, 25, 40, 60, 100 W - incandescent light bulbs.

    But "Governments around the world have passed measures to phase out incandescent light bulbs for general lighting in favor of more energy-efficient lighting alternatives" in http://en.wikipedia.org/wiki/Phase-o...nt_light_bulbs

    It's possible use LED or Economic light bulb?

    Or other Variac ... idea ?

    Best Regards,
    Ruy

    #2
    Re: Series light bulb trick

    large 1-3Kw heater is what i use.
    Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

    "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

    Excuse me while i do something dangerous


    You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

    Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

    Follow the white rabbit.

    Comment


      #3
      Re: Series light bulb trick

      The halogen bulbs, which are not yet on the ban list, can also be used. If all else fails, an appropriate resistor works fine too... Granted, getting a 60W resistor can be quite expensive.

      Comment


        #4
        Re: Series light bulb trick

        60w or lower regular incandescent lightbulbs can still be sold.

        There are halogen based incandescent lighbulbs that can be sold today because they're eating 40-60w but producing the equivalent of about 75 watts.

        There are 100w, 250w, 300w, 500w tungsten/halogen bulbs used for illuminating exteriors of buildings, like this for example:

        http://www.amazon.com/Sylvania-58887...s=halogen+bulb
        http://www.amazon.com/GE-Quartz-300-...s=halogen+bulb

        20w or lower lightbulbs will continue to be sold legally for bed lamps and stuff like that, so you could put 4-5 in series if you have to.

        I think you'll be just fine.

        Comment


          #5
          Re: Series light bulb trick

          Originally posted by mariushm View Post
          60w or lower regular incandescent lightbulbs can still be sold.

          There are halogen based incandescent lighbulbs that can be sold today because they're eating 40-60w but producing the equivalent of about 75 watts.
          ...
          Thank you very much for all your comments mariushm, eccerr0r.

          I can use the halogen and the effect is the same.

          I have a LCR and in AUTO mode the incandescent, halogen give R.
          But the economic C.

          The procedure is: the halogen is mark 55W ( lumens, candle - 60 W). We use the 55 W to measure the R.

          goontron - I don't understand your info ... 3KW ... I don't need to power a car

          Best regards,
          Ruy

          Comment


            #6
            Re: Series light bulb trick

            In the uk you can still buy 40w 60w and 100w relector light bulbs
            maybe only in edison screw fitting

            http://cpc.farnell.com/sylvania/0015...-es/dp/LP00966

            Or "Rough Service" bulbs

            http://cpc.farnell.com/ge-lighting/0...-bb45-00001003
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment


              #7
              Re: Series light bulb trick

              Originally posted by neuron View Post
              goontron - I don't understand your info ... 3KW ... I don't need to power a car

              Best regards,
              Ruy
              1-3Kw = 1000 to 3000 watts
              that's the wattage of the heater that is my replacement for the old bulb trick.
              Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

              "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

              Excuse me while i do something dangerous


              You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

              Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

              Follow the white rabbit.

              Comment


                #8
                Re: Series light bulb trick

                Originally posted by selldoor View Post
                In the uk you can still buy 40w 60w and 100w relector light bulbs
                maybe only in edison screw fitting
                ...
                Thanks,






                goontron - Can you detail your info ... I don't understand.

                I'm trying to limit the current!!!!!!!!!!!!! ... with your 3KW ... we have a short circuit again.

                Best regards,
                Ruy

                Comment


                  #9
                  Re: Series light bulb trick

                  I've used AC-rated capacitors for motor starting/running as a replacment for series limiters (generates no heat), since I learned that capacitors can be reactive components depending on frequency.
                  An AC voltmeter can be used between the Live input from the mains and the Live output to the load, and therefore, the AC voltmeter can be used as a "brightness" indicator.
                  As far as I know, halogen lamps can have undesirable characteristics for series limiters.
                  Last edited by japlytic; 11-03-2013, 07:05 PM. Reason: AC voltmeter
                  My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.

                  Comment


                    #10
                    Re: Series light bulb trick

                    The reason for using the incadescent lamp is that when the lamp does not light up the resistance is low, when it lights up, the resistance can be as high as 10X the cold resistance, so it is like having automatic variable resistance in series with the load, when the load draws too much the lamp will automatically reduce the current. You want that cold/hot resistance function and also as an indicator. Use this method since the 70's. My set up has two lamp sockets and bypass switch.
                    http://s807.photobucket.com/user/bud...tml?sort=3&o=0
                    Last edited by budm; 11-03-2013, 09:41 PM.
                    Never stop learning
                    Basic LCD TV and Monitor troubleshooting guides.
                    http://www.badcaps.net/forum/showthr...956#post305956

                    Voltage Regulator (LDO) testing:
                    http://www.badcaps.net/forum/showthr...999#post300999

                    Inverter testing using old CFL:
                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                    http://s807.photobucket.com/user/budm/library/

                    TV Factory reset codes listing:
                    http://www.badcaps.net/forum/showthread.php?t=24809

                    Comment


                      #11
                      Re: Series light bulb trick

                      BTW: I checked
                      100W 120V lamp cold resistance is 10 Ohms, so current draw at start up is 12A, then drop down to 0.833A after the lamp is fully lit.
                      200W 120V is 5 Ohms.
                      Last edited by budm; 11-04-2013, 12:56 PM.
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                      Comment


                        #12
                        Re: Series light bulb trick

                        Originally posted by japlytic View Post
                        I've used AC-rated capacitors for motor starting/running as a replacment for series limiters (generates no heat), since I learned that capacitors can be reactive components depending on frequency.
                        An AC voltmeter can be used between the Live input from the mains and the Live output to the load, and therefore, the AC voltmeter can be used as a "brightness" indicator.
                        As far as I know, halogen lamps can have undesirable characteristics for series limiters.
                        Instead of incandescent light?
                        Can you detail where I put the Cap (brand and type of motors??????) or AC voltmeter

                        F 220V - > Ac Voltmeter -> circuit with short?
                        N ____________________________________




                        Originally posted by budm
                        BTW: I checked
                        100W 120V lamp cold resistance is 10 Ohms, so current draw at start up is 12A, then drop down to 0.833A after the lamp is fully lit.
                        200W 120V is 5 Ohms.
                        But I use 100 W to power a TV and we need 1,..A or 2A to power ... if you get 0.833A ...????


                        Best regards,
                        Ruy

                        Comment


                          #13
                          Re: Series light bulb trick

                          0.833A is the maximum current it will allow to flow through the load. The purpose of the lamp is to help indicating if the Power supply has shorted circuit, you will not be running the TV with lamp in place. When I work on Monitor, I use 75W for up to 22inch, you will see the lamp flash bright for seconds then dims down.
                          For TV I start with 75W first to see if the standby power SUPPLY is OK since 5VSTBY is only about 2~3A. You will develop the sense of what you are seeing with the lamp to tell you if something is not quite right, it is hard to explain, but when you do it enough you will understand what you are seeing.
                          If the load requires 100W, then you will need to figure out what the series resistance should be so you will still get to within 10% of the running voltage on the load. When the lamp is fully lit due to short, the voltage on the load will be very small.
                          Never stop learning
                          Basic LCD TV and Monitor troubleshooting guides.
                          http://www.badcaps.net/forum/showthr...956#post305956

                          Voltage Regulator (LDO) testing:
                          http://www.badcaps.net/forum/showthr...999#post300999

                          Inverter testing using old CFL:
                          http://www.badcaps.net/forum/showthr...er+testing+cfl

                          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                          http://s807.photobucket.com/user/budm/library/

                          TV Factory reset codes listing:
                          http://www.badcaps.net/forum/showthread.php?t=24809

                          Comment


                            #14
                            Re: Series light bulb trick

                            Originally posted by budm View Post
                            0.833A is the maximum current it will allow to flow through the load. The purpose of the lamp is to help indicating if the Power supply has shorted circuit, you will not be running the TV with lamp in place. When I work on Monitor, I use 75W for up to 22inch, you will see the lamp flash bright for seconds then dims down.
                            For TV I start with 75W first to see if the standby power SUPPLY is OK since 5VSTBY is only about 2~3A. You will develop the sense of what you are seeing with the lamp to tell you if something is not quite right, it is hard to explain, but when you do it enough you will understand what you are seeing.
                            If the load requires 100W, then you will need to figure out what the series resistance should be so you will still get to within 10% of the running voltage on the load. When the lamp is fully lit due to short, the voltage on the load will be very small.
                            What other "guns" you have in your Lab.?

                            Best regards,
                            Ruy

                            Comment


                              #15
                              Re: Series light bulb trick

                              Old CFL for inveter tester:
                              http://s807.photobucket.com/user/bud...?sort=3&page=1

                              http://s807.photobucket.com/user/bud...?sort=3&page=1
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                              Comment


                                #16
                                Re: Series light bulb trick

                                Originally posted by neuron View Post
                                Instead of incandescent light?
                                Can you detail where I put the Cap (brand and type of motors??????) or AC voltmeter

                                F 220V - > Ac Voltmeter -> circuit with short?
                                N ____________________________________
                                Please instructions

                                Comment

                                Working...
                                X