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Display Mesage #98217


LED taillight
Written by dl_page on 10/26/2010 at 10:21 pm

Wolfgang,

It's late and i'm getting confused, you are correct. I'm sorry :)

Adding a resistor in series would work, but it would also drop the voltage to
the LED and make the bulb less bright - not good for a safety feature!

The extra load must be parallel - and would be the perfect excuse to install
extra LED indicators in the top case!

Daniel

--- In ipcrc@yahoogroups.com, "pc800@..." <pc800@...> wrote:
>
> Daniel,
>
> I am pretty sure !
>
> Of course you want to increase the load, but you do this by lowering the
> total resistance (=parallel) so that more current can flow, not by
> increasing the total resistance (= in line).
>
> If you have a load of a bulb of, lets say 12 watts, at the PCs
> electrical system of 12 volts, this means that the current that flows
> through the wire in the bulb is exactly 1 ampere (amperes = watts/volts).
> And the resistance of the wire is 12 ohms (resistance = volts/amperes)...
>
> If you put two bulbs in line, you have doubled the total resistance to
> 24 ohms, which results at 12 volts in a current of 0.5 amperes
> (amperes=volts/resistance) - or a "load" of 6 watts (watts = volts *
> amperes).
>
> If you put two bulbs parallel, you have in each bulb a current of 1
> ampere, resulting in a total of 2 amperes or a load of 24 watts.
>
> ==> if you want to increase the load, you have to put them in
> parallel.... ;-)
>
>
>
> Am 26.10.2010 22:10, schrieb dl_page:
> > Hum.... are you sure about that? If you have less load on the circuit (for
example a blown bulb that is now open circuit), half the load=twice the flashing
speed. Surely you want to increase the load to drop the speed down?
> >
> > Cheers,
> > Daniel
> >
> > --- In ipcrc@yahoogroups.com, Wolfgang Kaufmann<pc800@> wrote:
> >> Am 26.10.2010 21:45, schrieb dl_page:
> >>> The turn indicators were sold as "containing resistors to work with
indicator relay", though in practice, my indicators work at about 120 flashes
per minute (ok, still legal - barely) and turn cancel works magic.
> >>>
> >>> All in all, not too bad, and gives the alternator a rest, but tomorrow, I
may run off to my local electronics supply shop to find some big 5w resistors
and hook them up in line with each bulb, just to get the turn rate down
though...
> >>>
> >>> Cheers,
> >>> Daniel
> >> Daniel,
> >>
> >> you want to hook up your resistor parallel to the LEDs, not in line,
> >> because you want to bring the total resistance down !
> >>
> >> In line would increase the total resistance (total = LED + resistor),
> >> thus the blinking rate would increase even more !
> >>
> >> --
> >> Regards,
> >>
> >> Wolfgang Kaufmann (Austria/Europe),
> >> iPCRC # 634
> >> in order of purchase :
> >> PC800 `90, "Mazda Baby", 89 K miles (1992)
> >> PC800 `96, still unnamed, 15 K miles (2000)
> >> PC800 `90, "Harlequin", 53 K miles (2002 - completely restored project
bike)
> >> new in my stable:
> >> PC800 `96, still unnamed, 9 K miles (2006)
> >> PC800 `89 - nice little miniature (2007) ! (does this count too ??) ;-)
> >> http://tinyurl.com/2fokje
> >> http://www.mtc81.at/pc800.htm (in German language)
> >> http://tinyurl.com/ysqcqp
> >>
>

Message Thread for message #98217

aek_alex
10/25/2010, 01:38 am
LED taillight
Has anyone used different bulbs for taillights? May some bright flashing ones. Any suggestions on brighter LED Bulbs? I want to be a little safer by doing this. Thanks, Alex

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    10/25/2010, 02:11 am
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    LED taillight
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      douglasvanb
      10/25/2010, 09:14 pm
      LED taillight
      What did you do to make the turn signals flash at the proper rate? Anything special done so you don't burn out the self-canceling turn signal module? And here I was trying to save money this fall! :-) Cheers, Douglas ---

        dl_page
        10/26/2010, 07:45 pm
        LED taillight
        For info, I bought a series of LED signal and running/break lights. Thank you Ebay Hong Kong... For the running lights, no problems (except a bulb I badly installed fell out of the holder and I spent 40 minutes and swearwords in 2 languag

          wkaufmann2000
          10/26/2010, 07:58 pm
          LED taillight
          Am 26.10.2010 21:45, schrieb dl_page: > > The turn indicators were sold as "containing resistors to work with indicator relay", though in practice, my indicators work at about 120 flashes per minute (ok, still legal - barel

            dl_page
            10/26/2010, 08:10 pm
            LED taillight
            Hum.... are you sure about that? If you have less load on the circuit (for example a blown bulb that is now open circuit), half the load=twice the flashing speed. Surely you want to increase the load to drop the speed down? Cheers, Dan

              wkaufmann2000
              10/26/2010, 08:53 pm
              LED taillight
              Daniel, I am pretty sure ! Of course you want to increase the load, but you do this by lowering the total resistance (=parallel) so that more current can flow, not by increasing the total resistance (= in line). If you have

                dl_page
                10/26/2010, 10:21 pm
                LED taillight
                Wolfgang, It's late and i'm getting confused, you are correct. I'm sorry :) Adding a resistor in series would work, but it would also drop the voltage to the LED and make the bulb less bright - not good for a safety feature! Th