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  • #121
    Originally posted by Shreeni0403 View Post
    Ok i changed the capacitor with the same 25v 4700uf and this time the output voltage was 25v so i believe the circuit is fine.

    This time i tested it connecting to a bulb for 5mins and then i was unable to touch the capacitor. It was extremely hot.

    Does it mean i should connect capacitor also to heat sink or something else is wrong??     Or is it normal?
    Capacitor will also be hot along with the diodes. Try Putting capacitor directly on the Diode bridge, so that they share the heat sinks.

    Indicator, Bulb blowing off? Not possible, may the bulb was faulty.
    For trial run, put a 35V bulb on this circuit and test it for 30-40 mins, while you ride bike (max volts, with rev). If it's still works, the circuit will work.
    Been There, Done That; Better!

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    • #122
      I am building this circuit tonight. Will answer your questions tomorrow.
      Your biking tells a lot about the person you are!

      Comment

      • #123
        ^

        Waiting

        Comment

        • #124
          Got the circuit to work! The capacitor output without load was high (about 50V ) due to fluctuations and spikes from the regulator output AC. I connected the circuit DC output to battery and the battery voltage reads normal. Never connect the capacitor output to the battery or any load without first switching off the bike and discharging the capacitor. Else the 50V at capacitor due to voltage spikes from AC input will fry everything including the battery. So make sure the capacitor to battery connection is solid and does not ever disconnect and connect accidentally due to loose connection during operation.

          @rahuldevnath
          I think it is safe to include a resistor between the capacitor pins to safely discharge the capacitor when not in operation and to absorb some voltage spikes. What say? How about 1 Kilo Ohm?
          Your biking tells a lot about the person you are!

          Comment

          • #125
            I think it is safe to include a resistor between the capacitor pins to safely discharge the capacitor when not in operation and to absorb some voltage spikes. What say? How about 1 Kilo Ohm?
            Not a bad idea at all. But again the resistor needs to have really high tolerance value. Also a diode after the capacitor is needed so the current from the battery is not reversed. Else, even 1K will discharge the battery significantly over long period of time.

            Secondly, 50V going across, will not fry any thing. because all those 50Vs will is no more than 2~3 amps at peak!
            Been There, Done That; Better!

            Comment

            • #126
              Originally posted by rahuldevnath View Post
              Not a bad idea at all. But again the resistor needs to have really high tolerance value. Also a diode after the capacitor is needed so the current from the battery is not reversed. Else, even 1K will discharge the battery significantly over long period of time.

              Secondly, 50V going across, will not fry any thing. because all those 50Vs will is no more than 2~3 amps at peak!
              I connected the capacitor output not directly to the battery but after the ignition switch. So no diode needed. I will add a 1K resistor.

              And 50V should not fry the circuits but Shreeni's indicator bulb got white hot and fried. Hence i am being careful. I even tried without caps - the DC ripples prevented the bulbs from glowing fully.
              Your biking tells a lot about the person you are!

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              • #127
                yeah, without the capacitor, there are lot of ripples. Even on full bridge, relay doesn't work without a capacitor (when it is required in my setup).

                Nevertheless, try out and let us know how it works?
                Been There, Done That; Better!

                Comment

                • #128
                  I have created a new thread for others on how to convert AC wiring to DC
                  Your biking tells a lot about the person you are!

                  Comment

                  • #129
                    Originally posted by abhijeet080808 View Post
                    I have created a new thread for others on how to convert AC wiring to DC
                    Nice effort. but a line of credit for me, would much appreciated.
                    Last edited by rahuldevnath; 05-25-2009, 10:39 PM.
                    Been There, Done That; Better!

                    Comment

                    • #130
                      Originally posted by rahuldevnath View Post
                      Nice effort. but a line of credit for me, would much appreciated.
                      Sorry bro! Somehow forgot to do that. It is rectified now.

                      One thing - I am not using heatsinks - the diodes do not seem to get that hot, temperature is around 60 C.
                      Your biking tells a lot about the person you are!

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                      • #131
                        Originally posted by rahuldevnath View Post
                        Nice effort. but a line of credit for me, would much appreciated.
                        Aila.. I would give 85% of the credit to you, after all you were the one who suggested and you are already using it successfully

                        14% i will give to Abhi for helping me
                        and
                        1% i will keep for myself for all that work

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                        • #132
                          Originally posted by Shreeni0403 View Post
                          Aila.. I would give 85% of the credit to you, after all you were the one who suggested and you are already using it successfully

                          14% i will give to Abhi for helping me
                          and
                          1% i will keep for myself for all that work
                          That would be fine by me! Sreeni, you can keep a bigger portion too! - after all your prob and the subsequent hunt for solution lead to this result. And Rahul, had you not came along and said you have done this, I would not even have bothered to do this. My 60/55W headlight was, after all running fine, albeit with dimming below 2k rpm! Now, that dimming is eliminated and my bike is even HID ready! Once again thanks bro!
                          Your biking tells a lot about the person you are!

                          Comment

                          • #133
                            Oh well the vote of thanks. That's was just light comment.. not that serious. But seriously the credit goes to all 3 of us.. and let's leave percentage here..

                            I will post the circuit diagrams!

                            One thing - I am not using heatsinks - the diodes do not seem to get that hot, temperature is around 60 C.
                            Any idea what's the Amperage you are getting at 4K RPM? May be UG3 generate more current.
                            Been There, Done That; Better!

                            Comment

                            • #134
                              Originally posted by rahuldevnath View Post
                              Any idea what's the Amperage you are getting at 4K RPM? May be UG3 generate more current.
                              I will check and tell in a day.
                              Your biking tells a lot about the person you are!

                              Comment

                              • #135
                                Help Me Please

                                How to check ampere

                                Comment

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