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In this 3-minute short, I’ll show you how to modify an SMPS (Switch Mode Power Supply) having the optocoupler feedback circuit—a simple hack to turn your regular power supply into a DIY variable power source!

This is Part 1 of our SMPS mod series, where we explore basic-level modifications with real-time voltage control. Whether you’re an electronics hobbyist or just love DIY tech, this one’s for you.

What’s Inside:

SMPS basics with optocoupler feedback

Simple voltage regulation mod

Creating a variable output power supply

Quick demo of the voltage control in action

Stay tuned for Part 2, where we’ll test this mod !!

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