36V headlights

RustyKipper

100 W
Joined
Apr 13, 2015
Messages
117
Location
South Yorkshire UK the land of flat caps and wippe
Hey all.

Thought I’d just share my headlight build for my extreme commuter. This was brought about by 2 reasons;

1. I hit a nasty pothole on an unlit road way out in the sticks that put me in hospital
2. I keep putingt the light batteries on charge for an hour when I get into work and then completely forget about them until 5.00!!!!

I have had a magic shine lamp on the bike for a couple of years which is pretty good (simply awesome in the forest) but it has no beam pattern so blinds everyone and the batteries are just awful, I’m lucky to get an hours use out of them.

So I bought a couple of cheap Chinese magic shine copies from Ebay,


http://www.ebay.co.uk/itm/CREE-XM-L-XML-T6-LED-2000-Lm-Bicycle-Bike-light-HeadLight-Head-lamp-Rechargeable/172420908926?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D38661%26meid%3D6d36f06eeacb429bbc12d5d2785f87da%26pid%3D100033%26rk%3D2%26rkt%3D8%26sd%3D201392427186

they came with batteries, charger and a few mounts. For £12 they are not half bad, they have a decent beam that lights the road in front and they are not obnoxiously blinding to drivers. I figured I would fit 2 to give some redundancy and I have a bag mounted to the handlebars to carry my wet weather gear, the bag courses a bit of a blind spot if I only have one lamp, also having 2 lamps just look cool!

I wanted to run these lights from the main 36V battery pack, so purchased a couple of these step down switching regulator boards;


http://www.ebay.co.uk/itm/LM2596HVS-Voltage-Regulator-Board-6V-to-60V-INPUT-3V-to-30V-OUTPUT-New-Version/201392427186?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D38661%26meid%3D6d36f06eeacb429bbc12d5d2785f87da%26pid%3D100033%26rk%3D1%26rkt%3D8%26sd%3D201392427186


They are based on the LM2596HV switching regulator so should be good for 60V input and the built circuit board only cost £3.99 which is cheaper than I can build one for.

The bike gets used every day rain or shine and gets ridden through a lot of mud so I chose these ABS potting boxes and cable glands from RS Components;


http://uk.rs-online.com/web/p/potting-boxes/2250112/?searchTerm=225-0112&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E283F69292852537C5253207C52532D293F5C647B337D285C73293F5B5C732D2F255C2E2C5D285C73293F5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D3232352D30313132267374613D3232353031313226




http://uk.rs-online.com/web/p/cable-glands/4583969/



The circuit board needed a tiny amount if filing on both ends to fit the box.

I set the output of the regulator board to 8.2V to match the lights, soldered the wires on, tightened the glands and added a whole load of hot glue to stop the boards disintegrating from the vibrations.

I now have a pair of headlights that work extremely well up to about 25mph. I made up a third converter for the magic shine lamp, to save cutting the cable I bought an extension lead and wired one end into the converter, this means I can revert back to the original battery either at a later date or if my main battery fails in the back of beyond in the perpetual darkens of the UK winter commute I can at least have one working light to get me home safely. The magic shine now works as a main beam or I can set it to flash in the hours of twilight to be seen. The beauty is I no longer have to ration the amount of time I run the lights for, the homeward commute is about 45 minutes, and I no longer have to worry about forgetting to take the light battery off charge at work.

I also have a cool rear light made from 5 Ultra bright red leds build into the carbon rear mud flap, these are on when ever the motor controller is energised as a bit of extra safely.



dip main closeup.jpg

converter frame.jpg

rear leds.jpg

headlights on.jpg

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converter board.jpg

hot glue.jpg
 

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Nice work!
I saw a bike with dual headlights the other night when I was driving my car.
Made a huge difference in visibility of the bike to me as a driver, and also seemed to make it easier for me to judge bike speed and distance.
Think I should follow your example and make a setup like these for my bike.
Thanks for detailed build info!
 
Wow, thanks footloose that's really good to know.

I did kind of hope that duel headlights would make drivers think I was an approaching car so would be more inclined to wait before pulling out in front of me as they would be expecting something travelling faster than an ebike. Also I have a couple of nasty roundabouts so if other people see something that looks slightly unusual they might be a bit more wary I certainly am when I'm driving.

It has to be said that 2 lights light the way MUCH more than a single light which was a bit of a surprise. On the pitch black county roads the two lights together give a wider pool of light so when that wheel breaker of a pothole appears out of the dark in front you are able to se a bit more road around it to take avoiding action whereas with a single light you might just swerve around it right into another one.
 
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