Electric Bikes - Wiring lights
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06-01-08, 10:30 AM
I have a really bright LED light that works really good. It was very cheaply constructed though. First my bracket broke just from being on to tight (which wasn't tight at all) after one ride. So, I used me dremel to widen the bracket and used epoxy to stick it to the top of my handle bar neck. I actually liked this better. It was completely centered and looks like it was made like that. Clipped my light on and was proud of my forced modification. The next ride I took included going over a couple railroads one way. Second railroad, the light brakes off of the clip it's screwed to. :notamused: I was not happy, but it's still fixable. I can just epoxy the broke clip back on and it will be nice and solid. Shouldn't have any more problems like that. I can't put batteries in it any more though since the inside cartridge style battery harness broke. How can I wire my light to my 36v battery pack? The light took 4 AA batteries.
The output of this light is great I and don't want to have to get different light. I would have a useless clip on my neck too.
go to a bike store and pick up a few clamp on reflectors for parts there cheap and work great for lights.
4 AA batteries= 4.8 volts or 6 volts (rechargeable or alkaline, respectively).
You must provide your light with approximately this voltage for it to work right. What this means is that there is no good way to wire it in to your 36V battery pack without a DC-DC converter.
Anything designed to drop the DC voltage by six to eight times (like a converter that converts 80 volts to 12 volts) will probably be acceptable. If it is an AC to AC converter or an AC to DC converter it will not do what you want.
You can also use a resistor to drop the voltage, but the problem with that is that the battery will be putting out 6 times as much power as what will actually get to your light (the resistor will eat the rest).
You might want to just use a 4AA lighting battery pack separate from your 36V motor battery. You can connect the wires so that your 4AA battery pack is outside your light.
06-01-08, 03:00 PM
Thanks, I think I should be able to get it figured out. I have a few extra wires coming from my controller that may provide the right voltage.
06-01-08, 04:17 PM
would this work?
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