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Display Mesage #50114

The Great LED Experiment, Part 2
Written by humpthegrump on 9/29/2004 at 07:09 pm

Umm, correct me here if my basic electronics is off here, but isn't a LOAD
measured by power = Watts. You need to draw more current, not less, to
simulate a LOAD.

i.e., a shunt. A parallel path with low resistance (same resistance as the
brake lamp bulb) which negates any "power saving" in using LED's.

This is in reference to keeping the turn signal relay from "fast flashing"

"Tuppie" Tom, a wiz with a multimeter and a steak dinner both!


From: Kevin [mailto:kevin@...]
Sent: Wednesday, September 29, 2004 9:06 AM
Subject: PC800: Re: The Great LED Experiment, Part 2

--- In, "Seth Stern" <unlikelyloginname@y...> wrote:
> --- In, "Kevin" <kevin@q...> wrote:
> > ...
> > Next step, the signal bulbs. I'm doing these over the weekend since
> I'm not
> > sure if I'm going to need the inline load units for the
> trailer....if I do, I'll have to
> > order them. I know I will need them for the bike, but haven't
> gotten that far.
> >
> > (The PC800 requires the load of the bulbs for the flasher for the
> signals to
> > work right, however LEDs don't have enough load, so the PC800
> thinks it has
> > a dead bulb and flashes the signals at double rate to let you
> know...aka
> > "thermal flasher." What I'm not sure is if the Uni-Go will suffer
> from this due to
> > the isolation relay. I suspect not, in which case it will rely on
> the PC800s load,
> > which is still all bulb-based and okay.)
> > ...
> Kevin,
> Typically isolation relays are used so that the trailer lighting
> circuits place an insignificant load on the bike's lighting
> circuits. The flasher on the bike won't notice the trailer's
> flashers so there should be no need for added loads on the trailer.
> (The relays also prevent the bike's lights from going out in the
> event of a short in the trailer wiring.)

That's what I was counting on, but it's good to hear verification.

> Replacement of the bike's turn signals with LEDs will likely require
> either added loads to satisfy the flasher or replacement of the
> flasher with a solid-state version that has a constant flash rate
> regardless of load.

Yeah, that much I knew, and I plan to just get the "load mimic" inline
gizmos to
simulate the load rather than mess with the factory flash equipment. They
don't cost that much and I'll be in there re-wiring anyway.


San Leandro, CA
1996 Honda Pacific Coast 800 ("Red Dwarf")
49,500+ miles || HRCA #HM729375
2002 Uni-Go Trailer ("Starbug 1") || Trailer #499
Wednesday, September 29, 2004 || 9:06 AM PST
> Seth

The iPCRC humor and jokes subgroup :-)
In Memory of Christoffer Carstanjen

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Message Thread for message #50114

9/29/2004, 04:42 am
The Great LED Experiment, Part 2
Well, for those who are nay-sayers about LED replacements, I've got news for can be done, not cheaply, and not with simple bulb replacements, but it can be done...and WOW what a difference. I am using the 1.85" LED Clusters