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O-Like New 1W 445nm diode / 200mW 405nm laser diode driver.!

ped

ped

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Just while i have it, here is a size comparison pic, showing the "other side" of the driver that you can see in any other pictures.

15i8f92.jpg
 





lazeerer

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Thank for the Comparison.:) WoW its pretty big. It looks like double the size of the FlexDrvie.
 
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ped

ped

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Yeah its a hefty driver, but it feels good quality, i'm going to hook up a test with my rare A150 diode on sunday to see how it performs.
 
Last One Left

Last One Left

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Thanks for the pictures..i guess it is kinda big, but at the same time, flexdrive is VERY small lol..
 
ped

ped

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Ok the data is in.

Hooked up to a freshly charged 2800mAh Sanyo 18650

Batt = 4.21v (4.10 under load)

Current draw from battery = 1.1A

Driver vOUT = 4.32v

Driver I out = 740mA

p OUT new A150 diode = 693mW

O-Like say it should be 1.1w , as you can see its well below. Dissapointing.


bfondg.jpg



30vn4uw.jpg
 
LarryDFW

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Ped;

The driver is not delivering enough current. It needs some tweaking.

In your photo in post #17, you show a 1R0 resistor. That is most likely setting the voltage or current.

Try a parallel 4.7 ohm resistor across it. That should increase the current to the diode.

Thanks for taking the photos of both sides.

LarryDFW
 
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laserlighter

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any news on this driver?
because its nearly the same driver used in the waterproof 1W blue lasers with 18650 battery.

I have one of this laser myself and want to tweak the power a little bit.
 
ped

ped

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well, yes and no.

It may be that my diode was screwed , ive ordered more off DTR which will be here shortly and i'll repeat the tests.
 
laserlighter

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I opend the rayfoss 445 1W.
below you see the board.

nnuw3m.jpg

28i1b9y.jpg


I changed the 1Ohm resistor for 0.5Ohm and got a current draw of 1,75A instead of 1,15A.

Didn't measure the diode current because i don't want to unsolder the pressed in diode.
 
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lazeerer

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laserlighter

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No I'm not sure.
Its just a good value for the diode, should be about 1.1A.

If it will last i don't know. I make a 5-10min runtime test and if the driver dies I replace it with a new one.


EDIT:
Made a 2min run. Current raised up to 2.3A (battery is not the best). Host got a little bit warm (with 1,2A no warming in 2min).
I think further testing is required.
 
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laserlighter

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my new o-like driver board arrived today.

did some testing:

input:
4,0v 1,59A = 6,36W

output:
997mA 4,11V = 4,10W

efficiency
=64,4%

Hmm, not as efficient as i expected but the current is good!!
didn't change any resitors.

I will get a flexdrive soon to compare... (or are there already efficiency measurements in this forum?)
 
Fivos

Fivos

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Yes but won't that combination of wrong current and voltage damage your 445nm laser diode??? at 997ma it should be at 4.5 volts not at 4.1...
 
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