Blow the diode on a green laser from POT turned up
- Thread starter Fussy
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On a Leadlight 5mW - Just turn it up full, there shouldnt be a problem. To get it around 500mA - you'd have to start changing surface mounted componenets...
And no, the potentiometer doesnt stop turning, if you turn it too far, it will eventually end up back at allowing a minimum amount of current through...
You'll know if you go too far, as the laser wont work when you press the button down... if this happens, just turn the pot slightly back in the opposite direction.
And no, the potentiometer doesnt stop turning, if you turn it too far, it will eventually end up back at allowing a minimum amount of current through...
You'll know if you go too far, as the laser wont work when you press the button down... if this happens, just turn the pot slightly back in the opposite direction.
I found a pot on my red laser, yes I know green and red are totally different, but when I turned up the pot on the red it got ultra bright but I turned too far and it went ultra *not-bright* so I turned it back the opposite direction to find that Ultra Brightness and it wont go anywhere near how bright it was.. can this also happen with a greenie ? if you turn the pot to far and it restarts at low current you wont be able to get Max current anymore even if you turn it back.. ???
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Fussy said:
What about shorting the pot will that make it blow above 500mA?
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Yeah Id assume doing that would take the current draw into those kind of levels....
I havent tried it myself, but a few forum members have - hopefully they'll reply for you.
Fussy said:
What about shorting the pot will that make it blow above 500mA?
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Yeah Id assume doing that would take the current draw into those kind of levels....
I havent tried it myself, but a few forum members have - hopefully they'll reply for you.
Shiftlock
Enlightened
My Leadlight draws around 550mA with the pot shorted to the case. Incidentally, the metal on the top of the pot must be aluminum, because solder does not stick to it. I had to jam a wire under it to get a connection, but it's not tight so the power jumps around. I have "Aluminum Solder Paste" which I am going to try. I've bever used this stuff, so I don't know how well it will work. How have other people who have permanently shorted the pot done it? I'm still waiting for one of my power meters to arrive (I have 4 different units on the way) to get an accurate power reading of this laser and my bigger one.
zumlin
Enlightened
Re: Blow the diode on a green laser from POT turne
I also stuck a piece of wire to short the POT to the case and my power doesn't jump around at all. Mine is quite permanent if you don't open it up.
I also stuck a piece of wire to short the POT to the case and my power doesn't jump around at all. Mine is quite permanent if you don't open it up.
Re: Blow the diode on a green laser from POT turne
So why couldnt you take the pot off and extend the wires - there has gotta be someone here good enough at soldering to do that - then you could have the pot on the outside and adjust it all will??!!
So why couldnt you take the pot off and extend the wires - there has gotta be someone here good enough at soldering to do that - then you could have the pot on the outside and adjust it all will??!!
sbk
Newly Enlightened
Re: Blow the diode on a green laser from POT turne
Shiftlock, if you want permanently shorting the pot, I have pictures on my website on where you have to sold instead direct on the pot... Too big pictures to place on the forum /ubbthreads/images/graemlins/smile.gif
Shiftlock, if you want permanently shorting the pot, I have pictures on my website on where you have to sold instead direct on the pot... Too big pictures to place on the forum /ubbthreads/images/graemlins/smile.gif
Shiftlock
Enlightened
Re: Blow the diode on a green laser from POT turne
sbk, Thanks, I did find the same location on the pin to that transistor that was the same as the shorting to the case, but I couldn't find a solder spot that was the same as the pot housing. I'll try that when I get a chance. The aluminum solder paste didn't work well and just melted flux all over the board. Now it's all gooey.
sbk, Thanks, I did find the same location on the pin to that transistor that was the same as the shorting to the case, but I couldn't find a solder spot that was the same as the pot housing. I'll try that when I get a chance. The aluminum solder paste didn't work well and just melted flux all over the board. Now it's all gooey.
Azecos
Newly Enlightened
Re: Blow the diode on a green laser from POT turne
yes you can, just press the button, turn the pot till the laser stops. Then turn the pot a little back to the brightest point. Done! It's really easy. Only thing you should watch out is that you don't short the pot with the housing.
yes you can, just press the button, turn the pot till the laser stops. Then turn the pot a little back to the brightest point. Done! It's really easy. Only thing you should watch out is that you don't short the pot with the housing.
zumlin
Enlightened
Re: Blow the diode on a green laser from POT turne
I'm shorting my pot with the housing because i like that extra bit of juice.
I'm shorting my pot with the housing because i like that extra bit of juice.
Azecos
Newly Enlightened
Re: Blow the diode on a green laser from POT turne
Me too, but it eats batteries /ubbthreads/images/graemlins/grin.gif
Me too, but it eats batteries /ubbthreads/images/graemlins/grin.gif
zumlin
Enlightened
Re: Blow the diode on a green laser from POT turne
it is possible, i was holding the button down with my finger and turning the POT with a screwdriver
it is possible, i was holding the button down with my finger and turning the POT with a screwdriver
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