White wire charging power?

OrangeBrian · #1 03-10-2010, 12:46 AM

Can you charge a sla batterywith the white wire? Do you need to make a charging circut or some charging device. I am going to use it for a Norm light that I will soon buy. I wanted a steady light not one I have to go full throttle to make it bright.

Thanks, Brian

GearNut · #2 03-10-2010, 01:59 AM

There are sooo many threads on this subject that if you so a search on it it will make your head spin!
With all due respect to you, a search can give far more detailed in information than I will here.
In short, yes it can be used as a charging source.
However:
1. It must be one of the (1 in 100 chance yours is one) properly wound magnetos; most are not properly wound and will not put out enough power to charge or even power a light for that matter.
2. You will need a 1/2 wave rectifier (4 watt diode).
3. In addition to #2, it is best to have a charge controller too.

A search on this subject will enlighten you beyond your wildest dreams.

Once again, I mean no disrespect in any way, shape or form towards you.

svc · #3 03-10-2010, 02:12 AM

You will need a rectifying circuit (very easy 4 diodes, google for a pic). Its 6volt . I wired a big halogen spotlight with built in battery to mine and ended up losing spark, make sure you add a switch to turn the charge circuit off if needed to isolate problems. I have seen the photo's on here that show the white and blue wires aren't connected and they made sense, but that was my experience.
hope this helps

OrangeBrian · #4 03-10-2010, 02:16 AM

Oh oops. My fault Ive could of searched this be for posting this sorry and thanks.

GearNut · #5 03-10-2010, 02:19 AM

Quote:

Originally Posted by svc

You will need a rectifying circuit (very easy 4 diodes, google for a pic). Its 6volt . I wired a big halogen spotlight with built in battery to mine and ended up losing spark, make sure you add a switch to turn the charge circuit off if needed to isolate problems. I have seen the photo's on here that show the white and blue wires aren't connected and they made sense, but that was my experience.
hope this helps

A full wave rectifier ( 4 diodes) will kill your spark. Only a half wave will work, and you have to orient that single diode the correct way to enable the engine to run.

Scotchmo · #6 03-10-2010, 02:27 AM

Quote:

Originally Posted by GearNut

A full wave rectifier ( 4 diodes) will kill your spark. Only a half wave will work, and you have to orient that single diode the correct way to enable the engine to run.

I concur. A full wave would also require an isolated ground bus. Use a half wave. It is simple. It works.

svc · #7 03-10-2010, 02:34 AM

Thanks for the correction. My electronics knowledge is quite limited , mostly from when i was a kid taking things apart to see how they worked

GearNut · #8 03-10-2010, 02:38 AM

Quote:

Originally Posted by svc

Thanks for the correction. My electronics knowledge is quite limited , mostly from when i was a kid taking things apart to see how they worked

That's exactly how I got started! My mom hated me for it.

rkorson4209 · #9 03-10-2010, 03:53 AM

I think using a mini max generater with norms lights would be sweet. I am really looking into getting one of the mini gens Electrical Generator for Motorized Bicycle Lighting - eBay (item 400080371286 end time Mar-19-10 17:08:41 PDT)

HseLoMein · #10 03-10-2010, 02:11 PM

I have one, it works very well, and doesnt kill spark like using the white wire