,Reviews(1),Post(1),10/30/2008 |
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 Very, very good driver
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Strengths:Very powerfull, even with an almost empty NiMH (one). With two or three it is simply amazing. Superior to 1672.
Weaknesses:I have found none.
Summary:A must.
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,Reviews(1),Post(1),11/07/2008 |
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Good driver
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Strengths:Very good driver for single 3 or 3,6 V battery projects.
Weaknesses:None
Summary:
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Overdrive,Reviews(1),Post(1),02/03/2009 |
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Superb voltage range performance.
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Strengths:I've recently received this driver and I have to say it's the best driver I've seen so far.
Using a variable bench power supply this driver can drive a CREE at full power with almost
nearly perfect unvaried brightness throughout the entire 4.2 to 2.7 voltage range, the recommended usage range for common Lithium Ion Batteries.
The amount of dimming at 2.7 volts is so slight, it undoubtedly could go unnoticed when running from a battery so be careful.
The amazing thing about this driver is that it will startup on as little as 0.95 and run all the way down to 0.6 volts (very dim) before cutting off!
Weaknesses:The edges needed to be filed down a few micrometers so it could fit inside a 17mm pill,
it wasn't difficult to do, less than two minutes of handwork with a file.
Summary:This driver is superb for single 18650 battery applications as it makes full use
of the battery's charge without getting dim early.
I will likely buy more of these drivers in the future.
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Sparktastic,Reviews(4),Post(1),03/03/2009 |
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Not bad - could be better
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Strengths:Well built. Good PCB layout. Drives a cree XR-E well from 1.2v - 4.5v. Provides about 250mA to the LED (~80 lumens) when running from a single NimH AA and 1A or maybe a smidge over 200 lumens when driven from a 3.6-4.2v Lithium cell.
Weaknesses:Couldn't get memory mode to work! Couldn't change modes (A,B,C keh?)! Wanted High/Med/Low only but had to put up with those stupid strobes/SOS modes as well. Appears that there are a couple of tiny solder links on the board, but no information telling us what those links do!
No information available on KD or anywhere else, that I could find.
Small inductor and fets get hot when running at high brightness. Not sure how you could ever heatsink these components either. Recipe for eventual component failure IMHO.
Summary:An OK board, but there are better ones out there with more user friendly modes, higher current drive to the LED and better information.
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michalko99,Reviews(3),Post(1),03/10/2009 |
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very good regulator
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Strengths:works as is specified-from 1NiMH cell to LiIon. I bought 4 of these to try them firstly on desk and then use them in Cree bike light.
In low mode they delivers from 37mA to 72mA(same battery and Cree Q5 LED). Middle mode was very adecquate: all 4 were around 400mA. In high mode 2 delivered 990mA and two 1080mA. This might be caused by switching transistors conductance but I did not saw any difference when I switched them all 4 together. Maybe because 4cree´s made my eyes blind for a while :-)
Weaknesses:working with memory mode is pretty hard from beginning...
Summary:Definitely good investment, althrough they could be a little bit cheaper. If you need to drive Cree Q5 leds as me, this is best choice!
They are very tiny, no noise produced during operation and very easy to use in your own application
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old4570,Reviews(15),Post(1),05/09/2009 |
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Good Driver
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Strengths:Good driver if you want constant light output , I really hope it lasts . I hooked mine onto a R2 1 x CR123A .
Weaknesses:Modes / ABC - some instructions PLZ , I hate strobe/sos
How do you set Hi-Med-Lo
Summary:Its a good driver , but KD really needs to update product info , I would love to change modes , but how .
Other wise appears to be a really good driver
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