Mini DC-DC Step-Up (Boost) Converter Module – Selectable Output (5V/8V/9V/12V)

Need to power a 12V fan, a 9V multimeter, or a 5V sensor from a single small lithium battery? This ultra-compact boost converter is the solution. Unlike larger modules with potentiometers that can drift over time due to vibration, this board uses solder jumpers (labeled A and B) to set the output voltage permanently. It typically comes set to 12V by default but can be changed to 5V, 8V, or 9V in seconds with a soldering iron. Its tiny size makes it perfect for embedding inside small enclosures or retrofitting old electronics to run on rechargeable batteries.