"Jasen Betts" bravely wrote to "MIKE ROSS" (27 Aug 03  20:50:03)
 --- on the heady topic of "Vehicle LED's"

 JB> I've not seen a constant voltage dynamo used on a bicycle...
 JB> (actually I've not seen an dynamo on a bicycle for many years)
 JB> My dad had used to burn out lights by riding too fast, until he got
 JB> higher voltage bulbs...

Yep, my dyno dates from the mid 60's. I've babied its bearings all this
time. The rotor is a fat hockey puck shaped magnet. It's not exactly
constant voltage but above a certain speed it flattens out somewhat. But
lamps tend to be constant power devices anyway, and so they accomodate a
lot of the voltage range by themselves.

There are special bicycle lights with more robust filaments. These are
the larger frosted glass bulb type. I tried a cheap #47 but they burn
out too easily. But right now I'm using a Krypton 6V latern lamp. When
pedalling you can feel the threshold when the gas cycle kicks in as the
filament warms up to temperature. The brightness is so awesome though!

Might try switching to Nimh if I get tired of pedalling... ;-)

 Mike
 ****

... Dunno if we'll get that past the CSA und UL 'owever.
--- Blue Wave/DOS v2.30