my bike light

[Sponge]

I have made one cheap bike light. It's not small or nice looking, but there is a lot of light for 35$ + 20$ accu. It is made by 3xR2 connected in series in plastic colimator, all connected to 12V 4,5Ah lead accu through one diode (that is "driver"). Current is 1A. Lamp is cold on touch even when bike is not moving.
here is a few pictures of beam:

men is at 65m, bottle is on 7m distance

here are pictures of a lamp itself:

And this is how it looks on bike:

wall is about 5m distance, picture taken on bright, sunny daylight

 

[csshih]

looks pretty nice with that massive heatsink
I wish I had to skill, time, and/or material to do this.

 

[Buck91]

Its probably just a quirk of the photo itself, but what type of adhesive are you connecting the heatsink with?

 

[cytoe]

I like it :twothumbs

 

[Sponge]

Its probably just a quirk of the photo itself, but what type of adhesive are you connecting the heatsink with?

emiters are on stars, sanded and glued to sanded heatsink with arctic silver 2k thermoepoxy. heatsink and plastic pipe are glued with standard epoxy. heatsink and copper pipes are glued with epoxy.

 

[Sponge]

looks pretty nice with that massive heatsink
I wish I had to skill, time, and/or material to do this.

I think everybody who knows how to dril, sand, weld and mix epoxy can do this.
And if I have time with two small children :naughty:...
Material - led's and colimator are bought in DX, rest in local hardware store, heatsink and switch are from old motherboard&PSU (every computer service have a lot of these).thermal epoxy have any decent computer store, but one can use regular epoxy if sanding is done right. :rock:

 

[Mark_Paulus]

My 2 biggest concerns with lights:

Have you crashed it yet? Nothing worse than crashing in the dark (6:15 am) and then still needing to finish the ride with no lights... (I recently crashed mine when I hit some black ice on the trail on a curve. Bounced my cheek along the trail, and broke my thumb shifter. Did give me a good excuse to get back to grip shifters, tho...)

How does it handle bad weather (rain/snow/ice)?

Otherwise, that looks sweet. Are you using any electronics/converter boards? Where did you get the handlebar mount?

 

[Sponge]

My 2 biggest concerns with lights:

Have you crashed it yet? Nothing worse than crashing in the dark (6:15 am) and then still needing to finish the ride with no lights... (I recently crashed mine when I hit some black ice on the trail on a curve. Bounced my cheek along the trail, and broke my thumb shifter. Did give me a good excuse to get back to grip shifters, tho...)

How does it handle bad weather (rain/snow/ice)?

Otherwise, that looks sweet. Are you using any electronics/converter boards? Where did you get the handlebar mount?

lamp is waterproof, it have gasket on colimator and every hole is filled with epoxy. I don't use any electronics, except one diode in series with LED.
Mount is from DX - 3$.
If you look at the picture of bike, you will see another light placed on fork, it is halogen 3,2W light powered by dynohub.:thumbsup: