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 ...

CT21100 is high efficiency DCDC boost converter delivering 2.7V at 10mA from an input as low as 0.9V. Designed to work with a single alkaline/NiMh coin cell. To improve efficiency with ... CT21302 is ...