Displaying reviews posted
by certified DX gadget owners first, followed by all other posted reviews.
weird modes
Posted by
kapsel
on 3/3/2010
Involvement:
General (knows how to use it)
- Ownership:
1 week to 1 month
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Pros: gives enough mAh's for a step up converter
quite cheap
short mode memory- after about 3 seconds after turning off, it turns on again in first, HI mode, which is good in most cases
Cons: really weird modes- the ones I recieved last time was HI->really LO->strobe->blink every 7 seconds. The previous batch I ordered earlier had normal modes
Other Thoughts: could be 3 mode- who needs strobe or blink every couple of seconds
Bottomline: quite decent driver, if you don't mind weird modes- and you shouldn't- cause you don;t have to use them. regular user, not familiar with modes may not even notice it has any modes as the memory resets in a short time. The problem would be if it had long memory and switched to next mode every time turned on.
Great replacement circuit
Posted by
xachopin
on 6/4/2009
Involvement:
General (knows how to use it)
- Ownership:
1 week to 1 month
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Pros: - It's 16mm, not 17mm as most driver in DX
- As multiple modes
- Easy to install
- Works with 1 or 2 AA batteries
- I haven't noticed any flickering at the low settings (but I only used it for a few seconds, so maybe if you stay on low longer you'll notice the flickering)
Cons: - No mode memory
- The price could be a little lower. Other than that it's works great for the use I have.
- I would have prefered only Hi/med/low modes
Other Thoughts: The same unit with 3 modes (hi/med/low) and mode memory would be great.
Bottomline: I needed a 16mm driver to replace a defective (the light took a fall from 2m) on a cheap (but with good output)light. This driver is perfect for that, and as a bonus now my flashlight as multiple modes.
Cheap and decent boost driver for 2xAA
Posted by
desolder
on 12/25/2008
Involvement:
Expert (understands the inner workings)
- Ownership:
1 week to 1 month
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Pros: This is a cheap, decent boost driver for 2 NIxx/alkaline applications. It's a small size so it can fit in most spaces. It has 5 useful modes, not 20 crazy modes that nobody uses. If you want single mode, then it's easy to cut out the mode controller on top and connect the LED directly to the driver board using the well labeled L+ and L- points.
I removed the mode controller board on top since I only wanted a single mode for a flashlight upgrade. With 2D, here is what I measured:
Vin=2.6V Iin=1.4V Pin=3.64W
Vout=3.6V Iout=0.69A Pout=2.484W
efficiency = 68%
Cons: I wish efficiency was higher, but what can you expect for a dirt cheap boost converter?
Other Thoughts: Now that I completed the mod, I'm thinking I need more power. I'll have to check out the 1A capable boost drivers
Bottomline: Overall an OK driver. It's good for 2-cell lights driving the LED at about 700ma.
1xAA/2xAA
Posted by
googy
on 7/8/2008
Involvement:
General (knows how to use it)
- Ownership:
less than 1 day
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Pros: works with 1AA and 2AA
high and low modes, I don't need strobes
Cons: not very efficient, gets warm in the high mode
Other Thoughts: I wasn't able to measure the LED current, because my multimeter has a significant effect to the LED brightness, but I measured the LED voltage the current at a voltage you can find in the Cree XR-E Q5 datasheet
supply mode Vin Iin Vout Iout(not measured)
2xNiMH high 2,1 1,4 3,4 500~600
2xNiMH low 2,1 0,4 2,4 50~100
1xNiMH high 1,0 1,4 3,1 ~200
1xNiMH low 1,0 0,5 2,4 50~100
does still work @0,8 Vin (not tested lower input)
Bottomline: the measurements are not proven