I have a Gru Bee Sky Hawk or likesuch and need a meaningful light to run off the mag. Where can I find one? An LED would probably work. I wonder if an LED backup light for a car would run on 6V or whatever it puts out ?
need a headlight
- Thread starter trackfodder
- Start date
why not a battery led light
I bet even a cheap one will be brighter then a 6v
im using a 950 lumens led that looks about 1/2 as bright as a HID car headlight
it really helps being spotted during the day and at night its super bright
now if you can find a way to power a nice led light off that white wire then thats the best of both worlds
free power and brightness of led's
maybe run the wire into a battery charging circuit then power the leds off the battery
I bet even a cheap one will be brighter then a 6v
im using a 950 lumens led that looks about 1/2 as bright as a HID car headlight
it really helps being spotted during the day and at night its super bright
now if you can find a way to power a nice led light off that white wire then thats the best of both worlds
free power and brightness of led's
maybe run the wire into a battery charging circuit then power the leds off the battery
I freind of mine handed me a pair of 72 led crees with high an low beam that he had in his car an did not like , I just converted my head lamp an its more than adequate lighting .
Also I'm running my white wire through a full wave bridge rectifier to a 12 volt 7.5 amp hr bat that runs a full system of lights tail lights day running lights turn sigs an brake got my time between recharges up to about 3 hours which is significant from the 40 mins I used to have with a actual halogen bulb.
Also I'm running my white wire through a full wave bridge rectifier to a 12 volt 7.5 amp hr bat that runs a full system of lights tail lights day running lights turn sigs an brake got my time between recharges up to about 3 hours which is significant from the 40 mins I used to have with a actual halogen bulb.
Take a look at this, no batteries, no wires
http://www.gizmag.com/magnic-light-...aign=a2763413c4-UA-2235360-4&utm_medium=email
http://www.gizmag.com/magnic-light-...aign=a2763413c4-UA-2235360-4&utm_medium=email
interesting, not sure how bright 150 lumens is during the day, or at what angle would give the most light for safety reasons
But you can already get free power from the spinning magnet in the engine already enough to power a led if you have a way to reduce the voltage
but right now $130 to $199 can get you a ton of batteries and a cheapo light about the same size and probably the same output
give it 10 years I bet everything will have something like that
hhmmm i wonder why my cree led burned out? i ran it straight from the white wire and it burned for maby 5 seconds then it just died and i think it didn burn out because too much voltage. i have potentiometer so i can adjust the voltage what is going to the led.
You need to find the output voltage from the engine, find out what voltage the LED works at and put a resistor in line to the + side (long leg on the bulb) of the LED, LEDs don't tolerate over voltage at all, your 5 seconds is a good example. Once you've done this a potentiometer should allow you to dim it but why you would want to do that is a mystery to me, standard life of a LED is around 10,000 hours.
hmm i have the pot in the negative side of the led could that burn it out, i have less powerful 1 watt led that i ran with the pot in negative side and it didnt burn out. i have voltage regulator that works with 12v and you can select the out put 1.5/3/5/9 or 12v 1a max maby i use that but i need some case for the regulator.
You have to know at what voltage the LED works at, I doubt it's 12 volt, more than likely it's 3 volts and that's why you have to have a ristor inline with the + side that will restrict the output to that voltage.
I tried using a cree R2, which is good for up to 7v's, and although it worked, it pulsed instead of that even, steady light. I'm guessing that the cree needs dc current and not ac. Since I took apart a cree flashlight to set it into my bullet headlight, I just used the flashlight shell to hold my batteries to run it, so that's what I'm using until I can figure out how to do it differently.
Just get a LED mini flashlight and some-how mount it to the center of the bike's handle, as I did.
heres my bullet style light with 3 watt led i run it from 8 AA batteries witch give 10.5v and i have about 90 ohm resistor in it so the led runs at 2.8v so it will be a lillte brighter at 3 volts which is still safe to do.
http://s14.postimage.org/8kx6oo30h/SDC13867.jpg
http://s16.postimage.org/jtj6htgt1/SDC13870.jpg
http://s14.postimage.org/8kx6oo30h/SDC13867.jpg
http://s16.postimage.org/jtj6htgt1/SDC13870.jpg
So let me get this straight. I just add a diode to each of the positive and negative wires? I saw one of those things with 4 pins.....think it was a rectifier, but if that's all I need to do, then that'd be great.
