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Old 12-25-2010, 07:47 AM   #1
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Default problems with microboost

so I'm building my 445nm but I have problem with microboost. I soldered the 2 jumpers for highest range (540-1000mA), checked every connection with a magnifying lens and everything seemed ok but when I connected it on my testload and 18650, the current was first around 340mA and dropped to about 270mA after few seconds. now when I turn the pot, the current is changing from like 268 to 275mA
so what should I do now?

there's also one thing: when I measured the value of that component marked yellow, it showed like 1ohm...
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some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link

Last edited by 3zuli; 12-25-2010 at 07:55 AM.
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Old 12-25-2010, 07:52 AM   #2
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Default Re: problems with microboost

Whats your power supply and test load consist of
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Old 12-25-2010, 07:57 AM   #3
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Default Re: problems with microboost

psu is one 3.6V 18650
testload 6x 1N4007 in series and one 1ohm resistor
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some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 08:02 AM   #4
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Default Re: problems with microboost

That is roughly (.7)*6+A=Vf

Makes sense? There is not enough juice Try 3-5 diodes.
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Old 12-25-2010, 08:14 AM   #5
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Default Re: problems with microboost

ok gonna try it

edit: tried 4 diodes, now it's going from about 360mA to 410mA and when it hits 400mA it starts to whistle
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some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link

Last edited by 3zuli; 12-25-2010 at 08:21 AM.
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Old 12-25-2010, 08:16 AM   #6
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Default Re: problems with microboost

Yeah man, the less diodes, the higher the range should be.
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Old 12-25-2010, 09:08 AM   #7
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Default Re: problems with microboost

__________________
<< that's not me


some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 09:10 AM   #8
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Default Re: problems with microboost

Whistle? Nothing should be whistling. Lol Where is it coming from?
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Old 12-25-2010, 10:05 AM   #9
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Default Re: problems with microboost

from driver
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some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 10:08 AM   #10
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Default Re: problems with microboost

Well Yeah, Where on it?
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Old 12-25-2010, 10:11 AM   #11
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Default Re: problems with microboost

I dunno, I think it's comming from inductor...?
__________________
<< that's not me


some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 10:20 AM   #12
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Default Re: problems with microboost

I am trying to think why and component on a PCB would whistle. The only piece I ever had trouble with was on a cheap driver when a cap blew up. Can you take a picture, or video?
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Old 12-25-2010, 10:32 AM   #13
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Default Re: problems with microboost

I think nothing unusual can be seen on the driver... all solder connections are ok
but I still can't understand why it doesnt regulate in full range
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<< that's not me


some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 01:18 PM   #14
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Default Re: problems with microboost

__________________
<< that's not me


some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link
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Old 12-25-2010, 03:22 PM   #15
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Default Re: problems with microboost

Can you take you take a macro pic of your soldering job?
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Old 12-25-2010, 04:43 PM   #16
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Default Re: problems with microboost

here u r
(wires to LD are soldered temporary, because they go to test load. later I'll solder other wires, going to LD)
Attached Thumbnails
problems with microboost-p1010830m.jpg   problems with microboost-p1010831m.jpg   problems with microboost-p1010832m.jpg  
__________________
<< that's not me


some 5mW pointers
LPC-815 "mini labby" @ 350mA

SLD63518262 5mW 635nm
DX 5mW
DX 50mW
DX 30mW module in spirograph link
DX 50mW in modded LAS-7 spirograph link

445nm 800mW link
PHR-803T @ 105mA in DildaV2 kit link

Last edited by 3zuli; 12-25-2010 at 04:50 PM.
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