What i needed to make that laser is:- A laser diode, I used visible red diode, but you can use the color you want (or the one you have)
-LM 317 voltage regulator
-2x 10ohm 1/2w resistors
-1N4001 or somilar diode
-One 100nF capacitor
-A 100ohm potentiometer
-A push button
-The PCB (step 2)
-A case (step 4)
-A focusing system (steps 5 & 6)
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