The MT3608 is a popular boost converter, able to easily step up DC voltages in useful ranges, at an incredibly low cost. Modules can be sourced from eBay for less than $2, built on a PCB ...
The device utilizes the CH340E USB-to-serial chip and the MT3608 Boost Converter IC to function. The CH340E chip allows the device to interface with a computer or other device through a USB connection ...