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    USB Powered 5mW Green Laser Pointer

    Hi, I'm currently doing a project to power my 5mW green laser pointer using USB. I know that USB supplies 5V and maximum current of 500mA. My laser requires 2 AAA batteries to be powered so it gives a total of 3V. So, I decided to make a simple voltage regulator using LM317 circuit to step down...


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