Buck Boost Regulator using XL6009 with Adjustable 3.3V to 12V Output Voltage

This project implements a buck-boost voltage regulation circuit using the XL6009 switching IC, designed to maintain a steady output voltage even as the input voltage fluctuates above and beyond the desired output level. Powered by a 9V battery or adapter, the circuit relies on inductive and capacitive energy storage elements—including the 33uH inductors, 10uH inductor, and various filter capacitors like the 100uF and 1000uF components—to smooth out voltage ripples and manage energy transfer during switching cycles. The XL6009 IC rapidly switches current through the inductors, storing energy in their magnetic fields and releasing it to the output load through diodes such as the SR160 Schottky diode and the 1N4007 diodes. By adjusting the 10k preset potentiometer, the feedback loop of the regulator is modified, allowing the user to precisely set and stabilize the continuous DC output anywhere within the 3.3V to 12V range, regardless of whether the incoming source voltage sags below or rises above the target value.