Overkill Headlamp I built.
- Thread starter chadne
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Guy's Dropper
Enlightened
Sweet setup. I've been thinking about doing something like that.
You probably looked like another car.
You probably looked like another car.
Illum
Flashaholic
twin P7s?!
if your riding high on a gas moped with the mufflers tweaked cars might think those are the nosegear landing lights of a Cessna
if your riding high on a gas moped with the mufflers tweaked cars might think those are the nosegear landing lights of a Cessna
Nice work, I would like to buld a good P7 head lamp myself.
PhantomPhoton
Flashlight Enthusiast
:bow:
Very nice! Do you have those large reflectors set up to help with heatsinking?
Direct Drive?
:rock:
Very nice! Do you have those large reflectors set up to help with heatsinking?
Direct Drive?
:rock:
how hard are You driving them?
Because I am working on a mod using the 6-die Osram. Actually the led is mounted on a Pentium II heatsink that is way more massive than what is shown in the pic - and it needs less than 5 mins with just 500 mAh (each die series connected) that the sink is too hot to grip.
Doesnt this get hot on Your head?
PS: are there no front lenses?
Because I am working on a mod using the 6-die Osram. Actually the led is mounted on a Pentium II heatsink that is way more massive than what is shown in the pic - and it needs less than 5 mins with just 500 mAh (each die series connected) that the sink is too hot to grip.
Doesnt this get hot on Your head?
PS: are there no front lenses?
Changchung
Flashlight Enthusiast
Sauna head...
I bonded glass lenses to them the other night to get cover. The setup is just using the innards of a stock light from dealextreme diy parts
http://www.dealextreme.com/details.dx/sku.14413
It looked like about 6 watts was going to each head, so about 12 watts total input to the LED's, which I think is a conservative utilization of a p7.
http://www.dealextreme.com/details.dx/sku.14413
It looked like about 6 watts was going to each head, so about 12 watts total input to the LED's, which I think is a conservative utilization of a p7.
This is GREAT!!! I was just cruising around DX and saw these and thought they'd be an easy way to make a lightweight light with remote battery. I'm pretty new to electronics so I was wondering if you might be so kind as to list the parts you used to put everything together and how it was wired. What did you mount them to and how are they mounted? Are they screwed into something or are they glkued down? Do you just run both lights off the one big 8 cell battery pack? Would it be more versatile and useful to run each light off it's own smaller pack so you could effectively have high and low? Sorry for so many questions, but I'm pretty excited about this project and any information you could pass on would be greatly appreciated.
Thanks.
Thanks.
Each lamp has its own switch -- waterproof ones from batteryspace which gives a high and low, and waterproof power connectors from there as well.. I used the strapping from several headlamps I have, but needed velcro/nylon across the head because elastic caused too much motion. The rear battery holder is a cut down holder from an old DX 3watt headlamp. The batteries are magnetically attached to each other and to wires on top and then wrapped in electrical tape and the plasti-dipped. 4 sets of 2. The lamps themselves are attached to a headlight base from an old princeton tec bicycle light. Attached to that base I have a piece of delrin sheet acquired from usplastics.com that I cut a two holes into to support the lamps. Then I bound those to the delrin from the rear by putting in a fillet of two part acrylic from Home Depot. I also used acrylic on the back of the lamps to water seal them and to secure the solder and wiring to the lamps themselves. Then, I used plastidip spray to make the whole mess look a little more appealing.
Jagge
Newly Enlightened
- Joined
- Jun 17, 2008
- Messages
- 87
Not overkill at all.
Heat can't be any problem, P7 runs cool at 6W. If it heats up, heat is from drivers. And it also would mean drivers are not too good. I have used my home made single P7 headlamp for months now, it also consumes about 12W. It gets hot pretty fast if I burn it indoors, but while running outdoors with it it's never even hand warm. I guess Chadne's lamp should run even cooler.
Chadne, you should push it a bit harder, something like 20W like commercial headlamps Nexnite and Lupine Betty. Or ifor powell's 6 cree q5's. There is no much point carrying all the weight and using 2 P7 units if you drive it only at 12W. You could save a lot of weight and get about the same output by using only one P7 and driving it twice that hard. You could do it easily without heat problems.
But it is nice lamp already!
Heat can't be any problem, P7 runs cool at 6W. If it heats up, heat is from drivers. And it also would mean drivers are not too good. I have used my home made single P7 headlamp for months now, it also consumes about 12W. It gets hot pretty fast if I burn it indoors, but while running outdoors with it it's never even hand warm. I guess Chadne's lamp should run even cooler.
Chadne, you should push it a bit harder, something like 20W like commercial headlamps Nexnite and Lupine Betty. Or ifor powell's 6 cree q5's. There is no much point carrying all the weight and using 2 P7 units if you drive it only at 12W. You could save a lot of weight and get about the same output by using only one P7 and driving it twice that hard. You could do it easily without heat problems.
But it is nice lamp already!
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