14w Dynamo powered, LED bike lights **PICS!!**

12.4w Dynamo powered, LED bike lights

Just doing some testing with the new Shimano dynamo hub, & 4 series 3w LS...using a load matching circuit...WOW, Max output 12.4w!!

so power @ low speed is ok for me...used a flater curve for the voltage db circuit, more down the bottom end & less drop to transition...
Then a more peaky curve for the full wave so I could hit the max... not too worried about the other side of that curve as not much riding is above 50km/hr...

I am not kidding, its like a HID out on the trail!!! I am super happy!!!

Now if I can just ride always @ 40km/hr....

if anyone wants pic's / specs, let me know

Re: testing a 16w Dynamo powered, LED bike light

specs and beamshots? whatever for?

for the metric impared

10k=6.3mi
15k=9.3
30k=18.6
40k=24.8
44k=27.3

Stick to 40 clicks and hour? Easy - get a roadie! (ok, still not easy but lots of fun)

Re: testing a 16w Dynamo powered, LED bike light

Most impressed.

Do you have any idea how the new Shimano campares with the SON?

And, is it a diode-capacitor doubler? or some form of active matching circuit.

Do you mind revealing circit details?


Steve

Re: testing a 16w Dynamo powered, LED bike light

Load matching is the key...

The maximum power is achieved at a specific load current. This depends little on the speed, but mostly on the dynamo. In other words: A dynamo is a current source.

This guy did all the work...

load matching

dyno circuits

I just used his circuit for the shimano hub...have not tested with SON... saw somewhere it getting 8w's...




I used 200uf for the voltage db, as this flattened the cruve & boosted the bottom end...

Bryguy: got a few roadies...you can't beat the bush in the dark!!! so very very dark!!!

More pic soon, FTP site down...

It will be hard to go back to batterys after this...

Re: testing a 16w Dynamo powered, LED bike light

ohhh, i wish you had a light meter so i could see how much output your getting. i was looking at making a set of motorcycle driving lights putting out around 400-600 lumens. anyone have any idea what an estimate is?

Re: testing a 16w Dynamo powered, LED bike light

hizzo3 said:

ohhh, i wish you had a light meter so i could see how much output your getting. i was looking at making a set of motorcycle driving lights putting out around 400-600 lumens. anyone have any idea what an estimate is?

Click to expand...

go with incan, I think 1200 lumens would be enough...

try one of the WA series of super bulbs... one of them runs off that voltage... depending on what you are running from you may need up to 14.4vbulb...

Re: testing a 14w Dynamo powered, LED bike light

PIC's!!!!

Some setups I have been trying...been riding it for a few weeks now, it rocks, so bright, almost light for free!!!

I now run just one trilux...lighter, better spot & better @ lower speed