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:
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Parts: LM317, 10K POT, 220 ohm resistor, 104 capacitor, 10uF capacitor.
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![](https://i.ytimg.com/vi/QN71KopQV0M/maxresdefault.jpg)