explanation circuit charging battery from magneto self made

[Dave_Kriegel]

An electrician built a few of the chargers to charge my battery from the magneto Here is a good explanation from him on how it works there is a picture attached It does work !

>
> neat so does the 1156 bulb act as a resistor converting ac to dc???
> Best Wishes,Dave


No, it's the diode that converts AC to half wave DC. It's interesting that electrical\electronic circuits are very similar to closed-loop plumbing systems. A diode or rectifier is like a check valve, water can flow in one direction but not in the reverse. In the circuit below, electrons can flow fm right to left, but not in reverse. Think of the diode symbol as an arrow pointing at a wall, the arrow can't go through the wall, electrons\current can't flow fm left to right.
A plain resistor is like a fixed valve set to limit the amount of water\current that can flow through it.
Ohm's Law says: voltage = current x resistance or E = I x R. So, E/R = I ; 1volt / 10ohms = 0.1amps ; 2v / 10ohms = 0.2a ; 5v / 10ohms = 0.5a ; 12v / 10ohms = 1.2a ; if graphed it would be a strait line.
A filament bulb is an odd duck, with the filament cold and a very low voltage applied to it, the resistance is very low. As the voltage (y) is increased and the current (x) increases, the filament starts heating up which also starts increasing its resistance. It takes a greater voltage increase to get the same current increase. Because of this non linearity, a bulb can serve as a descent charging regulator. When the battery is discharged a lot and trying to draw a lot of current, the bulb will be bright limiting the charge rate, as the battery voltage rises, the bulb will dim allowing a continued descent charge rate.
Hope this wasn't too technical, John B PS- a plumbing part to explain a light bulb? Wow, I gotta think about that.

[TXGOAT2]

A coil of wire can also be used to limit magneto voltage/current applied to a load. Ford used this method with some magneto headlight circuits. An old 12 V ignition coil primary might serve the purpose. I have used bulbs to make a trickle charger out of a large battery charger.

[RajoRacer]

Isn't that system what John Regan built at Fun Projects ?

[Steve Jelf]

Isn't that system what John Regan built at Fun Projects ?

Yes, and he posted the diagram or one like it for us DIY cheapskates. John is a classy guy.

[W Austen]

I don't know why anyone would go through the hassle of building their own - John Ragens are reasonable and very professional looking not homemade looking.
I run one and obviously think it is great.

This is not prompted by Mr. Ragen, just a happy customer here.

[Steve Jelf]

I don't know why anyone would go through the hassle of building their own -

It's not much hassle, but that's now a moot point. With the demise of Fun Projects you're on your own to make it yourself with parts from Lang's or other sources.

[ABoer]

I made this , Thanks to John Regan !!

Toon