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Display Mesage #50106


The Great LED Experiment, Part 2
Written by unlikelylogi... on 9/29/2004 at 02:19 pm

--- In ipcrc@yahoogroups.com, "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.)

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.

Seth

Message Thread for message #50106