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Driver pot be moving?

mikeylee25

mikeylee25

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hi, I am currently adjusting my current on my laser. when I turn the pot, should it be going higher or lower like a screw? when I turn it it just spins around without it rising or getting lower? Not really sure about this...and the current doesnt really change.
Also when I powered my LD w heatwink of course, my eyes didnt hurt. Its a 1w laser 445nm blue.... are my eyes supposed to hurt from look at them?
 
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mikeylee25 said:
hi, I am currently adjusting my current on my laser. when I turn the pot, should it be going higher or lower like a screw? when I turn it it just spins around without it rising or getting lower? Not really sure about this...and the current doesnt really change.
Also when I powered my LD w heatwink of course, my eyes didnt hurt. Its a 1w laser 445nm blue.... are my eyes supposed to hurt from look at them?
Click to expand...

its not supposed to lower or raise bud. If you kept turning it now you will have to put it on a test load before you put it on a diode to make sure you don't blow the diode up
 
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does it blow up? or does it slowly lose its brightness?.. what would happen if your voltage is too high for your LD? how would you lower the voltage if it is too high?
 
mikeylee25 said:
hi, I am currently adjusting my current on my laser. when I turn the pot, should it be going higher or lower like a screw? when I turn it it just spins around without it rising or getting lower? Not really sure about this...and the current doesnt really change.
Also when I powered my LD w heatwink of course, my eyes didnt hurt. Its a 1w laser 445nm blue.... are my eyes supposed to hurt from look at them?
Click to expand...

Yes it goes higher or lower like a screw, it may be broken. The beam from a 1W 445nm should be very visible unless in bright light, it's ok to look at the beam, but the dot should be too bright to look at up close, a few feet anyway. Be very careful with that thing without safety glasses, watch out for reflective surfaces, glass, mirrors, if it's anything close to 1W it can do permanent damage to your eyes instantly.

Alan

Edit: let me rephrase that in case there's a misunderstanding, the power output of the driver will go up or down, not the screw itself, and it's not the voltage being adjusted, the driver is constant current, not constant voltage.
 
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mikeylee25 said:
does it blow up? or does it slowly lose its brightness?.. what would happen if your voltage is too high for your LD? how would you lower the voltage if it is too high?
Click to expand...

the diode will likely blow or as we call it LED lol the pot doesn't change the voltage it changes the current.

Pi R Squared said:
Yes it goes higher or lower like a screw, it may be broken.
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I don't think its a noticeable difference though.. well I guess depending on what driver is being used. I no the ones that Aixiz sells doesn't raise or lower enough to see a difference
 
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. though I know it changes the current not volt. what im saying is how would I lower the voltage if my output voltage is too high for my LED
 
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mikeylee25 said:
. though I know it changes the current not volt. what im saying is how would I lower the voltage if my output voltage is too high for my LED
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need more info.. how much voltage does the diode require, is it a hand held or a lab style laser? and what I meant by ledd is that's what the term is used for if the diode dies lol
 
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You don't need to worry about the voltage to the diode as long as the driver is appropriate for that diode and you are providing an input voltage to the driver within the correct range. The driver will change the voltage to keep the current at whatever it's set at.

Alan
 
noobphaser215 said:
need more info.. how much voltage does the diode require, is it a hand held or a lab style laser? and what I meant by ledd is that's what the term is used for if the diode dies lol
Click to expand...

Pi R Squared said:
You don't need to worry about the voltage to the diode as long as the driver is appropriate for that diode and you are providing an input voltage to the driver within the correct range. The driver will change the voltage to keep the current at whatever it's set at.

Alan
Click to expand...
my optical output on the driver is 5.5v and my operating voltage for my LD is 4.4v to 4.6 w/ a forward current of 1A.

when I turn on my driver and turn the pot, I hear a humming noise, is that normal?
 
Pi R Squared said:
You don't need to worry about the voltage to the diode as long as the driver is appropriate for that diode and you are providing an input voltage to the driver within the correct range. The driver will change the voltage to keep the current at whatever it's set at.

Alan
Click to expand...

clearly I need to get my facts straight lol
 
so what should I do if my driver optical boost voltage is higher than my required volts for my LD
 
Pi R Squared said:
No it's not normal.



You didn't say you were using a boost driver, are you powering this with one 3.7V Li-Ion battery?

Alan
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no im powering it with standard alkaline at 4.8 volts
if I use Li-ion I can use 3.7 but if not , up to 5.7v
 
so I was right after all. I need to stop second guessing my self. This is why I asked for more info. what driver and diode is being used
 
mikeylee25 said:
so whats your advice? get a new driver?
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not if its still good. again, what driver are you using and what diode is it. what are you trying to complete here bud..??? Alan is the one that'll really be helpful here I am not good at explaining it in a way you'll be able to understand.
 
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