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Old 02-23-2012, 10:25 AM #33
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Default Re: Flashlight drivers?

You could remove the stock resistor and replace it with a R150 resistor. That gives a nice 1.67A current. I am not fond running this driver at the max of 1.8A or 2A. It will heat up very fast at these amp level.


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Old 02-23-2012, 04:06 PM #34
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Default Re: Flashlight drivers?

You guys are awesome.
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Old 02-23-2012, 05:57 PM #35
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Default Re: Flashlight drivers?

I would like to do some builds with a driver that would let me operate the laser in different modes, like high, low, strobe, etc...

Would any of the multi-mode drivers here be suitable?

I'm not really interested in MAX mW as much as maybe stepping down a little from max current (depending on the type of diode) and building a reliable laser with some interesting modes.

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Old 02-23-2012, 06:20 PM #36
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Default Re: Flashlight drivers?

Quote:
Originally Posted by tsteele93 View Post
I would like to do some builds with a driver that would let me operate the laser in different modes, like high, low, strobe, etc...

Would any of the multi-mode drivers here be suitable?

I'm not really interested in MAX mW as much as maybe stepping down a little from max current (depending on the type of diode) and building a reliable laser with some interesting modes.
This is also what I would like to see, I have no use for really high powered lasers (although they are really cool) but small power adjustments, maybe just enough for like indoor/outdoor pointing use between 5-15mw, and strode, SOS signal, something like that.
Something like that with the single mode 445 diode would be sweet.
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Old 02-23-2012, 06:59 PM #37
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Default Re: Flashlight drivers?

This IC claims to have PWM, though admittedly it's not clear to me how you'd implement it. It does seem like you might be able to just sever the connection to pin 2, and interject some sort of strobe effect generating circuit in between.
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Old 02-29-2012, 06:53 PM #38
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Default Re: Flashlight drivers?

Where would I go about finding one of these R150 resistors and which one would I need to drive it at 1.8A or 2.0A?

Thanks for any help.

Glenn


Quote:
Originally Posted by Blord View Post
You could remove the stock resistor and replace it with a R150 resistor. That gives a nice 1.67A current. I am not fond running this driver at the max of 1.8A or 2A. It will heat up very fast at these amp level.
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Old 03-01-2012, 07:23 AM #39
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Default Re: Flashlight drivers?

I get stuff like that from Digikey.
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Old 03-01-2012, 07:29 AM #40
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Default Re: Flashlight drivers?

try mouser, farnell,

which ever is cheaper for your country
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Old 03-01-2012, 09:44 AM #41
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Default Re: Flashlight drivers?

I bought a set R250,R200,R150 and R100 from a local electronic shop. It was expensive. You should buy from the shops mention above.
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Old 03-01-2012, 10:51 AM #42
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Default Re: Flashlight drivers?

lower value resistors are more expensive and you should consider the tolerance.. 5% is very cheap, 1% is more expensive and 0.1% are very expensive and aren't available for most low values.

1% is a good choice though at reasonable price
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Old 03-01-2012, 05:43 PM #43
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Default Re: Flashlight drivers?

Quote:
Originally Posted by foulmist View Post
lower value resistors are more expensive and you should consider the tolerance.. 5% is very cheap, 1% is more expensive and 0.1% are very expensive and aren't available for most low values.

1% is a good choice though at reasonable price
Good info for us noobs!

Thanks,
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405nm tsteele93 12x build @ 545mW

445nm Survival Laser @ 1.25W - GIFTED
445nm Stainless Steel Monster with H140 diode @1.62A - 2.15W!
450nm rhd single mode @ 190mW

532nm O-like 50 mW pen from Cajun Lasers - small dot, tight beam!
532nm O-like Crown, rated @ 400mW, metered @ ~450mW with AW battery!
532nm O-like Crown rated @ 500mW, not yet tested
532nm RPL-165 @ 204mW
532nm RPL-375 @ 427mW

635nm rhd Lipstick Tube @ ~485+ mW
638nm Fat Boy @ 825mW - custom build

650nm Bolly BL-8006 @ 319mW

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