Electronic help

Quoting del :
I now have a DLumotec Oval and Seculite Plus. The dynamo I have, which
will eventually be replaced subject to funding, is a Union bottle job
(circa 1990). Can both these LED lights be run together without either
one burning out? Or should I use the old filament headlight as well?

The normal Oval is a filament bulb, not an LED. It should have a 2.4W bulb
if it is to be used with the Seculite and a 3W bulb if not.

Connect the lights in series or parallel, with or without the filament
h/light?

Headlight/taillight pairs go in parallel. If you were going to run a
second headlight that would go in series with a switch to short it out at
low speeds but that arrangement isn't viable with a bottle dynamo. Leave
the old headlight off.

The packaging suggests that the overvoltage protection is limited,
especially in the Seculite, for the time that they will run on their
own should the other blow it's diode or break a wire or some other
fault. Would getting a voltage regulator (zener diode?) help?

No point. If your headlight blows a bulb, you know about it (providing you
develop the habit of always turning the light off when you stop. Why? You
can ride in the day with the light left on and not notice - and then you
can blow the front bulb and not notice - but you can't ride in the dark
and not notice the light has been left off) - you can stop immediately and
replace it with a spare. If you don't have a spare, you can't ride legally
anyway. Therefore, you're unlikely to blow up the Seculite unexpectedly.

In the unlikely event that the taillight fails - or the more likely event
that the wiring to it goes - you'll tend to notice the headlight suddenly
becomes unusually bright, and even if you don't, the worst that happens is
that you blow up an inexpensive bulb.
--
David Damerell flcl?
Today is Second Brieday, September.

"David Damerell" wrote in message
...

In the unlikely event that the taillight fails - or the more likely event
that the wiring to it goes - you'll tend to notice the headlight suddenly
becomes unusually bright, and even if you don't, the worst that happens is
that you blow up an inexpensive bulb.

4 quid and I can't get them locally :-(

cheers,
clive