new light

Zebee Johnstone said:

I don't have the LED light, that's not come from Germany yet, Cheeky
Monkey loaned me a 3W halogen.

What's the voltage that you've got to play with? I've got a 3W LED you
could borrow which works from 4.8V, and will handle 6V OK. In fact, it'd
probably handle 6V better than 4.8 when it's on the 3W setting.

--
Dave Hughes | [email hidden]
"It's 106 miles to Chicago, we've got a full tank of gas, half a pack
of cigarettes, it's dark, and we're wearing sunglasses" - Elwood Blues

what dynohub etc did you end up getting?

flyingdutch said:

what dynohub etc did you end up getting?

And where did you get it, and how much was it?

Travis

In aus.bicycle on Thu, 25 May 2006 21:58:57 +1000

Random Data said:

Zebee Johnstone said:

I don't have the LED light, that's not come from Germany yet, Cheeky
Monkey loaned me a 3W halogen.

What's the voltage that you've got to play with? I've got a 3W LED you
could borrow which works from 4.8V, and will handle 6V OK. In fact, it'd
probably handle 6V better than 4.8 when it's on the 3W setting.

It's a 6v. Thanks for the offer, but the LED will get here in a
couple of weeks and the halogen's fine till then.

What's the one you have?

Zebee

In aus.bicycle on Thu, 25 May 2006 22:15:58 +1000

flyingdutch said:

what dynohub etc did you end up getting?

Me, I'm a gear queer 🙂 (Well on gear I understand, no idea in the
difference in groupsets so don't care about that...)

I got the German one, the Sono. I did that because a) I could and b)
http://www.myra-simon.com/bike/dynotest.html said it was the best.
Oh and c) the shop also recommended it.

It was more expensive, but bicycle stuff is dead cheap compared to
motorcycle stuff[1] so the extra over the Shimano didn't bother me.

I have ordered the LED light for it with the standlight. Name
blanking at the moment, but it's the oval one that's just like the
halogen but LED.

I noticed that the halogen standlight does stay lit for a long time -
mostly noticed when parking the bike while opening the garage door.
I was able to see into the garage by the standlight.

Zebee

[1] I own 4 Italian motorcycles....

In aus.bicycle on 25 May 2006 09:00:27 -0700

Travis said:

flyingdutch said:

what dynohub etc did you end up getting?

And where did you get it, and how much was it?

I got it from Cheeky MOnkey
http://www.cheekymonkey.com.au/transport%20home.htm who had to order
it in from their supplier. Who thought they had to order it in, but
later found one in stock. But they didn't have the light I wanted
which appears to be coming by land transport from Germany....

The hub cost 350 plus the cost of getting it built into the wheel.

You can check prices on http://www.stkildacycles.com.au which is a
horrible flash only website, but they do have a variety of dynamos,
hub and bottle, and lights for same.

Zebee

quote='Random Data'On Thu said:

I don't have the LED light, that's not come from Germany yet, Cheeky
Monkey loaned me a 3W halogen.

What's the voltage that you've got to play with? I've got a 3W LED you
could borrow which works from 4.8V, and will handle 6V OK. In fact, it'd
probably handle 6V better than 4.8 when it's on the 3W setting.

--
Dave Hughes | [email hidden]
"It's 106 miles to Chicago, we've got a full tank of gas, half a pack
of cigarettes, it's dark, and we're wearing sunglasses" - Elwood Blues[/QUOTE]

Hang about.
The output from a hub dynamo is AC not DC.

Pete

Zebee Johnstone said:

[1] I own 4 Italian motorcycles....

And a ute 🙂

In aus.bicycle on 25 May 2006 17:32:17 -0700

Bleve said:

Zebee Johnstone said:

[1] I own 4 Italian motorcycles....

And a ute 🙂

Nah. Just a *lot* of electrical wires and connectors....

Zebee

Poiter said:

Random Data said:

Zebee Johnstone said:

I don't have the LED light, that's not come from Germany yet, Cheeky
Monkey loaned me a 3W halogen.

What's the voltage that you've got to play with? I've got a 3W LED you
could borrow which works from 4.8V, and will handle 6V OK. In fact,
it'd
probably handle 6V better than 4.8 when it's on the 3W setting.

--
Dave Hughes | [email hidden]
"It's 106 miles to Chicago, we've got a full tank of gas, half a pack
of cigarettes, it's dark, and we're wearing sunglasses" - Elwood Blues

Hang about.
The output from a hub dynamo is AC not DC.

s'ok. Light Emitting DIODE

Poiter said:

Hang about.
The output from a hub dynamo is AC not DC.

As far as I recall, a dynamo is generally specifically DC, alternators are
AC. But then I'm no electrical expert.

--
Cheers
Peter

~~~ ~ _@
~~ ~ _- \,
~~ (*)/ (*)

Peter Signorini said:

Poiter said:

Hang about.
The output from a hub dynamo is AC not DC.

As far as I recall, a dynamo is generally specifically DC,
alternators are AC. But then I'm no electrical expert.

And it's usually varying DC, so has many of the characteristics of both AC &
DC - burns bulbs out faster, but can be transformed as it's fluctuating in
waveform. The level of variation is not as much as on early bike dynamos so
far as I know.

Karen

--
"I'd far rather be happy than right any day."
- Slartibartfast

Poiter said:

The output from a hub dynamo is AC not DC.

The regulator means it'll handle DC above about 4.8V no worries. Chucking
a rectifier in front of the reg. is a piece of [censored] if it is AC.

--
Dave Hughes | [email hidden]
I think it's a beautiful day to go to the zoo and feed the ducks.
To the lions. -- Brian Kantor

Zebee Johnstone said:

What's the one you have?

Homebrew Luxeon

Much like http://hired-goons.net/lights/luxeon-1w.php, only with a
different housing and a 3W LED.

--
Dave Hughes | [email hidden]
"Violins are the first refuge of the incontinent." The Cave

On 2006-05-26, Duncan (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

Poiter said:

Hang about.
The output from a hub dynamo is AC not DC.

s'ok. Light Emitting DIODE

Except that LEDs have a reverse junction breakdown voltage in the
region of 5V. So at full loading, it would be toast. But, before it
became toast, it was drawing no current, and hence the hub was putting
out 60V. So it would be very black toast.

A Dark Emitting Diode.

Would you believe a friode? Or perhaps a semidestructor? Maybe a
reversible diode? Not a light emitting resistor, fortunately.

--
TimC
"I used to be better at logic problems, before I just dumped
them all into TeX and let Knuth pick out the survivors."
-- Plorkwort, 26 September 2004 on alt.religion.kibology

In article <slrn-0.9.7.4-18425-27341-200605262327-
[email hidden]>, [email hidden]-
astro.swin.edu.au says...

Quoted message said:

On 2006-05-26, Duncan (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

Poiter said:

Hang about.
The output from a hub dynamo is AC not DC.

s'ok. Light Emitting DIODE

Except that LEDs have a reverse junction breakdown voltage in the
region of 5V. So at full loading, it would be toast. But, before it
became toast, it was drawing no current, and hence the hub was putting
out 60V. So it would be very black toast.

A pair of 3W Luxeon's in series works fantastic off a schmidt hub.
I have this on my bike, the only other bit is a bridge rectifier to
convert the AC into DC.
Any electronics 101 book will show the solution of AC into DC.

The hub can only provide 600mA, but can easily produce over 6V.
The commercial lights use a voltage limiter @6V to stop burning out the
lights. The Luxeon will do this automatically.
The 600mA is a perfect match to the Luxeon's 1000mA max, and increasing
the current beyond 600mA does not produce a heap more obvious light
anyway.

The only downside, as with all dynamo's is no motion, no light.

Been using this for over a year now, never bother to turn the lights off
as the drag is not noticable, as originally posted, and it saves
worrying about where to mount the switch!

Check our Bikecurrent and you'll find a lot of people do pretty muchly
this with 3W luxeons.

Oh yeah, you never have to worry about charging batteries 🙂

Cheers, Ray

TimC said:

A Dark Emitting Diode.

DED. Heh.

--
..dt

All of this is really making me start to think that I need a utility bike of
some sort. Nexus hub in the back, dynohub in the front, and enough pannier
and rack space to act as transport for Cirue du Soleil. Funds unfortunately
prohibit me just getting and building up a Surly or similar though.

In aus.bicycle on Sat, 27 May 2006 11:00:40 +1000

Ray said:

The only downside, as with all dynamo's is no motion, no light.

The standlight in the halogen I've borrowed stays lit for some time
with the bike stationary.

Enough to be seen at a stopsign, while perhaps not enough to read a
book by....

Zebee