It seems from the Bulb life thread that there are a lot of drivers ICs =
for white LEDs
is that for any special reason? I mean your regular red LED never had a =
driver IC..
are the white LEDs "special" in some way, or can I drive them with a =
series resistor=20
like I do with all the other LEDs?

I'm not sure how many LEDs one would need to give sufficient lite..I was =
thinking 4 maybe..and a couple of red ones for the tail light..
you mentioned NiCd, I thought those could only be recharged when they =
were completly drained or you pretty much ruined them.

I wasn't part of the Piclist at the time for thsoe free cells :/

/Patrik
----- Original Message -----=20
From: "Roman Black" <fastvid@EZY.NET.AU>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, July 08, 2001 6:42 AM
Subject: Re: [EE]: LED bicycle headlight


> Patrik Husfloen wrote:
> >
> > Neat, I was looking to do the same thing, though I have a =
dynamo/generator driving my bulbs.
> > so I guess I'd need some rectifier circuit, using a backup cap to =
give som glow while stopped might be nice also.
> > too bad I have no clue on electronics :)
>=20
>=20
> Hi Patrik, what about a small NiCd or NiMH
> battery pack (like the free ones someone gave
> to piclisters before?) Small and lightweight.
>=20
> That gives continued glow when the bicycle is
> stopped, steadier glow when moving and is a very
> simple way of protecting the LED headlight from
> overvoltage.
>=20
> You need the NiCd battery, LED and it's resistor,
> and maybe a protect zener and on/off switch
> would round it out nicely. Nothing too complicated
> there.:o)
> -Roman
>=20
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.
>=20
>=20

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