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Lux V & r123 (li-ion) - Which converter?
- Thread starter sunbeam
- Start date
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flex76italy
Enlightened
- Joined
- Feb 5, 2005
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Ciao paesano!
Is possible with fatman driver
PM in email for detail
Is possible with fatman driver
PM in email for detail
mobile1
Flashlight Enthusiast
I looked at this setup 5W powered by an R123 for my Gattling light design.
First you need a protected R123. And second you will get about 8min of runtime due to the internal resistance before the protected version shuts down - George tested that setup for me. I think 8min is too much of a price to pay.
First you need a protected R123. And second you will get about 8min of runtime due to the internal resistance before the protected version shuts down - George tested that setup for me. I think 8min is too much of a price to pay.
flex76italy:
Ciao!!
I'm testing right now fatman, but with one r123 it cannot go over 800mA, using 2 R123 it can go at 1A but not below 850!
So I need 2 R123!/ubbthreads/images/graemlins/mecry.gif
Someone know if it is the same with BB or another boost?
Francesco
Ciao!!
I'm testing right now fatman, but with one r123 it cannot go over 800mA, using 2 R123 it can go at 1A but not below 850!
So I need 2 R123!/ubbthreads/images/graemlins/mecry.gif
Someone know if it is the same with BB or another boost?
Francesco
Sunbeam,
If you are going to use 2XR123, then you will may longer need a boost converter, but a buck converter. This will depend on the Vf of the luxeon that you are using.
Since you are mentioning going with a single R123, I'm going to assume that this will be going into a small light with a small reflector or optic. If this is the case, I'd recommend going with a more conservative drive level. Maybe something along the lines of 500mA. This will get you lots more run time and greatly reduce the heat generated by the luxeon. Belive me, you'll get lots of light at 500mA.
George's converter will probably work (and work well), but its footprint is a bit larger than that of the badboy or downboy converters. I believe the Fatman is .8" in diameter and Wayne's converters are .55" in diameter.
Protected R123s have protection circuits that prevent over charging and over discharging. Protected cells typically have less capacity than unprotected cells.
If you are going to use 2XR123, then you will may longer need a boost converter, but a buck converter. This will depend on the Vf of the luxeon that you are using.
Since you are mentioning going with a single R123, I'm going to assume that this will be going into a small light with a small reflector or optic. If this is the case, I'd recommend going with a more conservative drive level. Maybe something along the lines of 500mA. This will get you lots more run time and greatly reduce the heat generated by the luxeon. Belive me, you'll get lots of light at 500mA.
George's converter will probably work (and work well), but its footprint is a bit larger than that of the badboy or downboy converters. I believe the Fatman is .8" in diameter and Wayne's converters are .55" in diameter.
Protected R123s have protection circuits that prevent over charging and over discharging. Protected cells typically have less capacity than unprotected cells.
Tony,
Thanks for the informations!
I need 1A becouse I need to drive for about 1 minute Lux V royal blue to polimerize composite material for dental restoration!
The problem is that maybe I cannot drive at 1A with only one r123!
Francesco
Thanks for the informations!
I need 1A becouse I need to drive for about 1 minute Lux V royal blue to polimerize composite material for dental restoration!
The problem is that maybe I cannot drive at 1A with only one r123!
Francesco
If you need to get 1A, I'd abandon the idea of getting that kind of current out out a 3.7v power source. I'd go with multiple protected R123s with a buck converter. I've used the downboy quite often and have never had any problems with it.
sunbeam,
The sandwiche shoppe carries them, and jsburly's has them. I'm using jsburly's cells and like them.
Just keep in mind that there is a fine line when driving a lux V with two 123 size cells. If running 2X123, you'll need to use a boost converter. When running 2XR123, you'll need a buck converter.
My point is this. I'd go with a 3X123 body, with the buck converter, if I could. This way, you could use either the R123s or 123s in a pinch. If you go with the two cell body, you're going to limit yourself to the use of the li-ion cells.
The sandwiche shoppe carries them, and jsburly's has them. I'm using jsburly's cells and like them.
Just keep in mind that there is a fine line when driving a lux V with two 123 size cells. If running 2X123, you'll need to use a boost converter. When running 2XR123, you'll need a buck converter.
My point is this. I'd go with a 3X123 body, with the buck converter, if I could. This way, you could use either the R123s or 123s in a pinch. If you go with the two cell body, you're going to limit yourself to the use of the li-ion cells.
