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Which is the right direction to turn potentiometer on cd laser to incrase the laser power to increase the laser current
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<blockquote data-quote="Lasherž" data-source="post: 8715346" data-attributes="member: 679555"><p>Most laser circuits use an LM-317 adjustable voltage regulator. The adjust pin connects through the potentiometer to the resistance divider which raises the voltage the lower the trim value goes, so counter-clockwise = more voltage. If you're trying to make a small adjustment keep in mind that not all pots and circuits are created equally, so since you want to raise it by 15% presumably without a circuit diagram it's best to do this via voltage value between the + and - side of the laser diode itself, moving the pot very slowly. It should be apparent exactly where you want it based on the value it currently sits at + 15%. Cover the laser any time you power it without the enclosure, that'd be pretty dumb way to obtain vision damage.</p><p></p><p>I actually thought that CD players used digital trim pots that changed on the fly, but I guess you learn something new every day.</p></blockquote><p></p>
[QUOTE="Lasherž, post: 8715346, member: 679555"] Most laser circuits use an LM-317 adjustable voltage regulator. The adjust pin connects through the potentiometer to the resistance divider which raises the voltage the lower the trim value goes, so counter-clockwise = more voltage. If you're trying to make a small adjustment keep in mind that not all pots and circuits are created equally, so since you want to raise it by 15% presumably without a circuit diagram it's best to do this via voltage value between the + and - side of the laser diode itself, moving the pot very slowly. It should be apparent exactly where you want it based on the value it currently sits at + 15%. Cover the laser any time you power it without the enclosure, that'd be pretty dumb way to obtain vision damage. I actually thought that CD players used digital trim pots that changed on the fly, but I guess you learn something new every day. [/QUOTE]
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Which is the right direction to turn potentiometer on cd laser to incrase the laser power to increase the laser current
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