The XL6009E1 DC-DC Converter Module is a buck-boost converter, which means it can both step up (boost) and step down (buck) an input voltage to provide a stable output. This makes it very useful for battery-powered projects where the input voltage may fluctuate above or below the required output. 🔹 Key Features: Chipset: XL6009E1 Input Voltage: 3.5V – 32V DC Output Voltage: 1.3V – 35V DC (adjustable via potentiometer) Output Current: Up to 3A (recommended ≤ 2A for continuous use without extra cooling) Efficiency: Up to ~94% Switching Frequency: 400 kHz (high frequency for better efficiency and smaller components) Type: Auto Buck-Boost (works whether input is higher or lower than output) Protection: Input reverse polarity protection (in some versions), but no short-circuit protection (use carefully) 🔹 How It Works: If input < output → boosts voltage If input > output → reduces voltage Uses PWM switching control to regulate stable DC output Voltage is adjusted using the onboard multi-turn potentiometer 🔹 Applications: Powering microcontrollers (Arduino, ESP32, Raspberry Pi) from unstable battery sources Battery charging circuits Solar-powered projects LED drivers (constant voltage applications) Car electronics (maintain stable output from varying 12V supply) 🔹 Example Use Case: If you power it with a single Li-ion battery (3.7V – 4.2V), you can adjust the output to 5V and run an Arduino or Raspberry Pi stably. 🔹 Wiring: IN+ → Positive input voltage IN- → Negative input (GND) OUT+ → Positive regulated output OUT- → Negative output (GND)