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Old 07-18-2010, 08:19 AM #1
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Default A130 pulsed output

My A130 diode, running off a DIY DDL driver at 1A is definitely giving a pulsed output. I suspected it when moving the beam around quickly noticed a strobing dot. Now I've been bouncing it off a spirograph and it's unmistakable, the circle is divided into segments rather than continuous like my other lasers... any ideas why? I can't fathom it. Lowering the voltage to the driver seems to increase the off periods making the effect more pronounced, so not the voltage regulator going into thermal protection.


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Old 07-18-2010, 08:29 AM #2
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Default Re: A130 pulsed output

Just wondering, but is it running off AC from the wall? If so you probably need better filtering in your power supply. Pulsating dc will cause a flicker like that.
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Old 07-18-2010, 08:50 AM #3
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Default Re: A130 pulsed output

Hmmm... I'm going to do a test and I'll get back to you, it's possible I suppose.

Edit: you're dead right. Problem solved. How stupid LOL
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Old 07-18-2010, 08:59 AM #4
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Default Re: A130 pulsed output

Yeah, just switch to batteries if you are using ac/dc. Then you will know and you can go back to ac/dc with some modifications. I get a pulsed 445nm when I'm using the microboost, when the battery gets low. However, I shut down immediately, because the driver and battery starts to get hot.
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