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Old 07-13-2013, 12:23 AM #1
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Smile Using flashlight driver as driver for the LPC-826.

Recently on a shopping site found a driver flashlight, which promises to 400mA with a error rate 50mA + -. I wonder if for my LPC-826 that already put 500mA, could use this driver. Some of his information and the website link below.
- Voltage: DC 0.9 ~ 4.2V (1 x AA or 1 x 14500 battery)
- It works in 5 modes: 100% power, 30% and 3%, and SOS 9HZ. (As for the SOS 9HZ and I will not use.)
- Current: 420mA + / - 50mA



5-Mode LED Driver Circuit Board for Flashlight (DC 0.9~4.2V) - Free Shipping - DealExtreme
Sorry for my english.


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Old 07-13-2013, 09:45 AM #2
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Default Re: Using flashlight driver as driver for the LPC-826.

You would have to check with a multimeter for it's real output... i can say at 200mA a lpc-826 will EASILY burn when focused with a acryllic lens... As long as it gives a continuous set current then it should be okay, but at 1.5v it wont power a lpc-826 diode. you would need at least 2 AAs and they wont last long.
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Old 07-13-2013, 10:58 AM #3
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Default Re: Using flashlight driver as driver for the LPC-826.

Mine seemed to put out around 360 mA. Sadly I think I killed it trying to get it to 1-mode instead of 5 so I never got to test it on a lpc-826 The driver also comes in this flashlight.

Ultrafire C3 Stainless Steel Cree Q5-WC 5-Mode 190-Lumen Memory LED Flashlight (1*AA/1*14500) - Free Shipping - DealExtreme
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Old 07-13-2013, 10:45 PM #4
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Default Re: Using flashlight driver as driver for the LPC-826.

Thanks guys. I'll buy that drive and see how it will give output. I hope you do not pass the 480mA which is what I tested on my LPC.

Again sorry for my english. I need to practice.
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Old 07-19-2013, 04:55 PM #5
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Default Re: Using flashlight driver as driver for the LPC-826.

Hey William
Good to know you're doing fine on the forum

if you think a flashlight driver (mainly sold on DX) would fit a laser, you can search for it on the forums... like "LED DRIVER DX", etc...

Its hard to know if a driver like this would work or not, you would need an oscilloscope (no problem heheh) to verify for output spikes that would kill diodes.

Get one and test it.

As JoopdeWolf said, there is a C3 flashlight that already has that driver. Its cheaper to buy that because you get host + driver + power led... and the C3 is a cool host imho.

Btw, I'm driving that diode we extracted @ 430mA.

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Old 07-19-2013, 06:21 PM #6
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Default Re: Using flashlight driver as driver for the LPC-826.

With a red diode, maybe look into driving it at 350mA with an AMC7135 driver. Very common flashlight driver, comes on 17mm rounds already, and often has modes too. Sometimes even selectable mode groups!

https://illuminationsupply.com/led-d...iver-p-46.html < This one is hard set at 3 modes. You'll want to remove all but one of the AMC7135 ICs. Each IC adds 350mA to the output, basically.

https://illuminationsupply.com/led-d...ver-p-142.html < this one is neat because it has selectable modes. Unfortunately, it is a bit more expensive, and again, you'd want to remove all but one for a 350mA output. Seems like a bit of a waste to buy an 8-chip and remove 7 of 'em.

An Important word of warning here, though: these drivers assume that your case is negative, and this is a negative side regulator. A red diode's case is negative, though. Basically, if you don't isolate your red diode's case from the flashlight's case, the current from the diode will bypass the regulator (which is what "slows it down" to 350mA), and instead just use the metal of the light to make its way to the battery's (-) terminal.

You can buy single amc7135 chips from that site as well, both the 350mA and 380mA versions. No mode controller or circuit board.

The buck and boost drivers you would have to test to make sure there aren't any crazy spikes.
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