LM317 is 1.5-A, 40-V, adjustable linear voltage regulator. I will show you how to make this circuit without using PCB or breadboard.

You can buy bunch of LM317 here:
https://www.banggood.com/custlink/3GG...

Parts: LM317, 10K POT, 220 ohm resistor, 104 capacitor, 10uF capacitor.

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