First time posting in this subforum, but after reading through many threads I know there's some folks with experience to share.
I'm looking into building my own light set, and so far my research has pointed me toward a single Cree or Seoul emitter powered by a Shimano DH-3D71 dynamo hub. The hard part has been nailing down how to go about it electronically. After reading through a few sites there seems to be no concensus on pucks versus direct multiple LEDs, techniques for a standlight, current protection, bridge rectifiers, etc.
I realize that there are many considerations for lights. Some folks need the most powerful lights possible, others are trying to do the most with the least and building on a tight budget. These are my considerations:
- Emitter does not have to be the most powerful on market, just a good balance of performance/power requirements/longevity
- Space considerations limit me to one emitter, possibly two if stacked vertically
- Long bulb life
- Automatic optical switch, integrated
- Manual shutoff switch, remote
- Flashing taillight w/standlight
- Electronics will be homebuilt
- Enclosure will be homebuilt
- Quality componentry/design that lasts
Although my electronics skills are basic, I have a good friend that can fabricate whatever I'd need as long as I can give him a schematic. My skills lie in making the enclosure to heatsink properly and to fit the aesthetics of my project, which is a gentleman's city bike based on a Surly Steamroller converted to 650b. It has an 8-speed Nexus rear hub with coaster brake, so this obviously isn't a speed machine requiring the top performance in lighting, just something reliable, stylish and simple.
I apologize for the criticism as I very much admire what has been done with homebuilt lights technically...but have found quite a few to be lacking in aesthetics. I'm going for a clean, retro, old world look, so as few wires, switches and mounting brackets will be exposed as possible, hence the automatic optical switch and discreet manual shutoff. The enclosures will be integrated into homebuilt fenders, so long bulb life will create less hassle in changing them out, although I will design them to be disassembled...it's just not something I'd want to do regularly.
What I am asking for is a parts list, schematics for electronics boards needed, impressions of the relative merits of emitters, or any guidance at all. I already have the 650b dynamo wheel built and am already tinkering with ideas for the copper enclosure. Any electronics boards or taillight designs must be flexible enough for me to place them in any sort of enclosure I might come up with that fits the overall look.
So far I am liking the Circuit 12 design at www.pilom.com that fits into a headtube, but am confused as to whether it includes a standlight, provisions for a taillight or could be modified for optical and manual switches.
Thanks in advance for any input.