Hi guys. Never done anything like this before, so please be gentle.
Ok, it goes like this. I've been toying around lately with making a 18650 powered CREE based twistie built more for hikers/camping/general use. The idea is to have a durable light with variable brightness that will light up a tent at night for several nights or provide extremely bright bursts when needed. I'm aiming for a wide bright hotspot with lots of flood. Not going to be a throw monster. I still have work to do on the internals, but I thought i'd see if anyone was even interested before I dedicated anymore time to the project.
Ok, on to the pictures.
Features:
-1 Cree XR-E
-18650
-2 tritium slots on tail (1.75mm deep, longer than 6.5mm)
-Centered lanyard hole (for tent hanging)
-Piglet board running 500ma High and 25-75 (undecided) low
-McR reflector
I'm looking to do a run of atleast 100. If enough people are interested, i'll finish the design and get serious about pricing out machining, etc. Let me know what you think
Added 12/7/06 3:30 PM
Ok, looks like it is going to use a piglet board running 500ma and somewhere between 25-75ma for low.
Runtime Calculations:
Battery=3.7V*2.2A=8.14W
High: 3.5V*0.5A=1.75W
**estimated 80% converter efficiency gives= 2.19W
Low: 2.9V*0.05A=0.145W
**estimated 80% converter efficiency gives= 0.181W
High: 8.14W/2.19W= 3.72 hrs @ ~ 100 lumens @ led *ESTIMATED*
low: 8.14W/0.181W=44.97 hours ~ 15 lumens @ led *ESTIMATED*
I suspect these calculations are a bit on the lowside as well.
** Converter efficiency as provided by goldserve is 80-90%, depending. Good solid 85%. So, I think the numbers above should be close enough
Price:
VERY rough estimates puts this at above $100, minimum. It should be $150 or less though. Again, as below, I won't be held to this. I'm not far enough along to make this a guaranteed quote. Just a ballpark figure to help YOU gauge your interest so that I know if there is enough to completely finish the design and get ready put a signup list on the forum for a run.
Dimensions:
Spent some more time. Looks like it'll be about 23mm wide and 128mm long give or take. Walls are 2mm thick at their thickest. Some places are thinner (grooves, etc)
Ok, it goes like this. I've been toying around lately with making a 18650 powered CREE based twistie built more for hikers/camping/general use. The idea is to have a durable light with variable brightness that will light up a tent at night for several nights or provide extremely bright bursts when needed. I'm aiming for a wide bright hotspot with lots of flood. Not going to be a throw monster. I still have work to do on the internals, but I thought i'd see if anyone was even interested before I dedicated anymore time to the project.
Ok, on to the pictures.
Features:
-1 Cree XR-E
-18650
-2 tritium slots on tail (1.75mm deep, longer than 6.5mm)
-Centered lanyard hole (for tent hanging)
-Piglet board running 500ma High and 25-75 (undecided) low
-McR reflector
I'm looking to do a run of atleast 100. If enough people are interested, i'll finish the design and get serious about pricing out machining, etc. Let me know what you think
Added 12/7/06 3:30 PM
Ok, looks like it is going to use a piglet board running 500ma and somewhere between 25-75ma for low.
Runtime Calculations:
Battery=3.7V*2.2A=8.14W
High: 3.5V*0.5A=1.75W
**estimated 80% converter efficiency gives= 2.19W
Low: 2.9V*0.05A=0.145W
**estimated 80% converter efficiency gives= 0.181W
High: 8.14W/2.19W= 3.72 hrs @ ~ 100 lumens @ led *ESTIMATED*
low: 8.14W/0.181W=44.97 hours ~ 15 lumens @ led *ESTIMATED*
I suspect these calculations are a bit on the lowside as well.
** Converter efficiency as provided by goldserve is 80-90%, depending. Good solid 85%. So, I think the numbers above should be close enough
Price:
VERY rough estimates puts this at above $100, minimum. It should be $150 or less though. Again, as below, I won't be held to this. I'm not far enough along to make this a guaranteed quote. Just a ballpark figure to help YOU gauge your interest so that I know if there is enough to completely finish the design and get ready put a signup list on the forum for a run.
Dimensions:
Spent some more time. Looks like it'll be about 23mm wide and 128mm long give or take. Walls are 2mm thick at their thickest. Some places are thinner (grooves, etc)
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